Merge branch 'master' of https://git.riverrooks.dev/venus/blog

.env

@@ -1,2 +1,5 @@
 obsidian_vault=/home/venus/Documents/Personal-Wiki
+obsidian_vault_url=git.riverrooks.dev/Personal-Wiki
+OBSIDIAN_VAULT_URL=git.riverrooks.dev/Personal-Wiki
+obsidian_vault_token=bd8cd9301ae2c1c5bacfb3340492acb5e862686a
 

.gitignore

@@ -0,0 +1,5 @@
+app/__pychache__
+public-vault
+compose.yml
+content/
+public-vault/

Dockerfile

@@ -0,0 +1,29 @@
+FROM python:3.14-slim
+
+#install git
+RUN apt-get update && apt-get install -y \
+    git \
+    && rm -rf /var/lib/apt/lists/*
+#install dependencies
+RUN mkdir /app 
+COPY app/requirements.txt /app
+RUN pip3 install -r /app/requirements.txt
+
+#parse from .env file
+ARG DEBUG_MODE=0
+ARG obsidian_vault=/home/venus/Documents/Personal-Wiki
+ARG OBSIDIAN_VAULT_URL=git.riverrooks.dev/venus/Personal-Wiki
+ARG obsidian_vault_token=bd8cd9301ae2c1c5bacfb3340492acb5e862686a
+
+ENV FLASK_DEBUG=$DEBUG_MODE
+ENV FLASK_APP=app
+# ENV OBSIDIAN_VAULT=$obsidian_vault
+ENV OBSIDIAN_VAULT_URL=$OBSIDIAN_VAULT_URL
+ENV OBSIDIAN_VAULT_TOKEN=$obsidian_vault_token
+
+COPY app /app
+
+ENTRYPOINT ["flask"]
+CMD ["run", "--host=0.0.0.0", "--port=80"]
+
+

app/Dockerfile

@@ -1,21 +0,0 @@
-FROM python:3.10-slim AS builder
-
-ARG DEBUG_MODE=0
-ENV FLASK_DEBUG=$DEBUG_MODE
-ENV FLASK_APP=app
-
-
-
-COPY requirements.txt
-
-RUN pip3 install -r requirements.txt
-
-COPY . .
-
-
-EXPOSE 443
-ENTRYPOINT ["flask"]
-# CMD [ "run", "--host=0.0.0.0", "--port=80"]
-CMD ["--app", "app", "run", "--host=0.0.0.0", "--port=443"]
-
-

app/___init___.py

@@ -1,35 +0,0 @@
-from flask import Flask
-import markdown
-from pathlib import Path
-
-app = Flask(__name__)
-
-CONTENT_DIR = Path(__file__).parent.parent / "content"
-
-@app.route("/hello")
-def hello_world():
-    return "<h1>Hello, World!</h1>"
-
-@app.route("/")
-def index():
-    # Write your markdown content
-    md_content = "# Welcome to my blog!\nThis is rendered from **Markdown**."
-    # Convert it to HTML
-    html_content = markdown.markdown(md_content)
-    return html_content
-
-@app.route ("/post/<filename>")
-def render_markdown_file(filename):
-    filePath = CONTENT_DIR / f"{filename}.md"
-    # 3. Protect against missing files
-    if not filePath.is_file():
-        return f"<h1>404</h1><p>Could not find {filename}.md in {filePath}</p>", 404
-    # else:
-    #     return f"<h1> found</h1> <p> found {filename} in {filePath}</p>"
-    # 4. Open, read, and convert the file
-    with open(filePath, "r", encoding="utf-8") as f:
-        textContent = f.read()
-        
-    htmlContent = markdown.markdown(textContent)
-    
-    return htmlContent

app/__init__.py

@@ -0,0 +1,29 @@
+from flask import Flask
+from app import build
+from pathlib import Path
+import markdown
+import os
+from dotenv import load_dotenv
+
+app = Flask(__name__)
+
+PRIVATE_VAULT_DIR = Path("/vault")
+PUBLIC_VAULT_DIR = "/content"
+
+build.obsidian_vault(PRIVATE_VAULT_DIR) # initialize the private obsidian repo
+build.public_vault(PRIVATE_VAULT_DIR, PUBLIC_VAULT_DIR) # initialize the public notes from the private repo
+
+@app.route("/")
+def index():
+    md_content = "# Welcome to my blog!\nThis is rendered from **Markdown**.\n##[test](http://localhost/test)"
+    html_content = markdown.markdown(md_content)
+    return build.html_file("index.md", PUBLIC_VAULT_DIR)
+@app.route("/api/vault-update", methods=['POST', 'GET']) #webhook for vault updated
+def update_vault():
+# TODO SECURE THIS WITH SECRETTTTT or auth header
+    build.obsidian_vault(PRIVATE_VAULT_DIR) # initialize the private obsidian repo
+    build.public_vault(PRIVATE_VAULT_DIR, PUBLIC_VAULT_DIR)# initialize the public notes from the private repo
+    return "vault-rebuilt"
+@app.route ("/<filename>") # renders a filename if not otherwise specified
+def render_post(filename):
+    return build.html_file(filename, PUBLIC_VAULT_DIR)

app/build.py

@@ -1,26 +1,62 @@
 from obsidian_parser import Vault
 import shutil
+import markdown
+from pathlib import Path
+import os
+
+
+def html_file(filename, contentPath): #renders markwown from filename 
+    filePath = Path(f"{contentPath}/{filename}.md")
+    # 3. Protect against missing files
+    if not filePath.is_file():
+        return f"<h1>404</h1><p>Could not find {filename}.md in {filePath}</p>", 404
+    # open the file for reading
+    with open(filePath, "r", encoding="utf-8") as f:
+        textContent = f.read()
+    # convert it to markdown
+    htmlContent = markdown.markdown(textContent)
+    return htmlContent
+
+
+def obsidian_vault(dest = "/vault"): # makes sure there is a vault in dest
     from git import Repo
+    url = os.getenv("OBSIDIAN_VAULT_URL")
+    token = os.getenv("OBSIDIAN_VAULT_TOKEN")
+    if not(token):
+        print ("token not found, cant build vault")
+        raise NameError("tokenNotFound")
+        return 0
 
+    url = f"https://{token}@{url}"
 
+    if os.path.exists(os.path.join(dest, '.git')):
+        #TODO handle merge conflictsjjj
+        print (f"pulling vault from {url} in {dest}")
+        repo = Repo(dest)
+        origin = repo.remotes.origin
+        origin.fetch()
+        origin.pull(strategy_option='theirs')
+        print ("vault updated")
+        return 1
 
-def clone_secure_repo(url: str, token: str = "", dest: str): # clone a gittea repo using optional security token into dest dirand return a path to the directory
+    print (f"building vault from {url} in {dest}")
-    return dest
+    Repo.clone_from(url, dest)
+    print("cloned vault!")
+    return 1
 
-def public_notes(src: str): # return a list of notes tagged with public from an obsidian directory
+def public_vault(privateVault = "/vault", dest = "/content"): # build the public vault in dest from an obsidian repo in src
-    # build vault from source
+    #TODO delete old documents
-    vault = Vault(src)
+    vault = Vault(privateVault)
-    if vault:
+    if not(vault):
-        print ("found vault")
-    else:
         print("could not find vault")
-        return []
+        raise NameError("vaultNotFound")
+        return 0
 
-    # return a list ofnotes
+    print(f"valid vault{vault}")
-    return vault.get_notes_with_tag("public")
     
+    publicNotes = vault.get_notes_with_tag("public")
 
-def buld_public_vault(src: str, dest: str): # build the public vault in dest from an obsidian repo in src
+    print(f"publicNotes: {publicNotes}")
-    for note in public_notes(src):
+    for note in publicNotes:
         print(note.title)
         shutil.copy2(f"{note.path}", dest)

app/requirements.txt

@@ -1,2 +1,5 @@
 flask
 markdown
+obsidianmd-parser
+GitPython
+python-dotenv

compose.yml

@@ -1,15 +1,23 @@
 services:
   app:
+    container_name: blog
     build: 
-      context: app
       args:
         - DEBUG_MODE=1
-    ports:
+        - obsidian_vault_url=https://git.riverrooks.dev/Personal-Wiki
-      - '80:80'
+        - obsidian_vault_token=bd8cd9301ae2c1c5bacfb3340492acb5e862686a
     volumes:
-      - ./content:/content
+      - ./content:/content #public
-  # public_vault_builder:
+      - ./public-vault:/vault #private
-  #   build:
+    labels:
-  #     context: public_vault_builder
+        - "traefik.enable=true"
-  #   volumes: 
+        - "traefik.http.routers.blog.rule=Host(`riverrooks.dev`)"
-  #     - ./public_vault:/content
+        - "traefik.http.routers.blog.entrypoints=websecure"
+        - "traefik.http.routers.blog.tls.certresolver=myresolver"
+        - "traefik.http.services.blog.loadbalancer.server.port=80"
+    networks:
+      - proxy
+
+networks:
+  proxy:
+    external: true

content/AWK cheatsheet.md

@@ -0,0 +1,171 @@
+---
+tags:
+  - AI
+  - notes
+  - coding-notes
+  - docs
+  - public
+---
+### 1. Basic Syntax
+
+The standard structure of an `awk` command:
+
+Bash
+
+```
+awk [options] 'BEGIN { initialization } pattern { action } END { finalization }' file
+```
+commands
+- **`BEGIN { ... }`**: Runs _once_ before the first line is read. Great for setting variables or printing headers.
+    
+- **`pattern`**: A condition (regex or math) that must be met for the action to run.
+    
+- **`{ action }`**: The command(s) executed on each line that matches the pattern.
+    
+- **`END { ... }`**: Runs _once_ after the last line is processed. Great for printing totals or summaries.
+    
+
+---
+
+### 2. Common Command-Line Flags
+
+|**Flag**|**Description**|**Example**|
+|---|---|---|
+|`-F`|Defines the field separator (default is space/tab)|`awk -F"," '{print $1}' file.csv`|
+|`-v`|Assigns an external variable to use inside AWK|`awk -v max=100 '$1 > max' file`|
+|`-f`|Reads AWK commands from a script file|`awk -f script.awk input.txt`|
+|`-i inplace`|Edits the file in place (requires GNU awk)|`gawk -i inplace '{print $1}' file`|
+
+---
+
+### 3. Built-in Variables
+
+|**Variable**|**Meaning**|**Example Use Case**|
+|---|---|---|
+|`$0`|The entire current line|`print $0`|
+|`$1, $n`|The 1st, 2nd... _n_th field (column)|`print $2, $4`|
+|`NR`|Number of Records (Current line number)|`NR > 1` (Skip headers)|
+|`NF`|Number of Fields (Total columns in current line)|`print $NF` (Print the last column)|
+|`FS`|Input Field Separator (Same as `-F`)|`BEGIN { FS=":" }`|
+|`OFS`|Output Field Separator|`BEGIN { OFS="," }`|
+|`RS`|Input Record Separator (Default: newline)|`BEGIN { RS="" }` (Paragraph mode)|
+|`ORS`|Output Record Separator (Default: newline)|`BEGIN { ORS="\n\n" }` (Double space)|
+
+---
+
+### 4. Operators & Conditionals
+
+**Relational & Logical Operators:**
+
+- `==`, `!=`, `<`, `>`, `<=`, `>=` (Standard math comparisons)
+    
+- `~` (Matches regular expression)
+    
+- `!~` (Does not match regular expression)
+    
+- `&&` (AND), `||` (OR), `!` (NOT)
+    
+
+**Control Structures (used inside action blocks):**
+
+```
+# If/Else Statement
+{ if ($1 > 50) print "Pass"; else print "Fail" }
+
+# For Loop
+{ for (i=1; i<=NF; i++) print $i }
+
+# While Loop
+{ i=1; while (i<=NF) { print $i; i++ } }
+```
+
+---
+
+### 5. Essential Built-in Functions
+
+|**Function**|**Description**|**Example**|
+|---|---|---|
+|`length(str)`|Returns the length of a string|`length($0) > 80`|
+|`tolower(str)`|Converts string to lowercase|`print tolower($1)`|
+|`toupper(str)`|Converts string to uppercase|`print toupper($1)`|
+|`substr(s,p,l)`|Extracts substring from _s_ starting at _p_ with length _l_|`print substr($1, 1, 3)`|
+|`gsub(r,s,t)`|Globally replaces regex _r_ with string _s_ in target _t_|`gsub(/apple/, "orange", $0)`|
+
+---
+
+### 6. Handy Everyday One-Liners
+
+**Printing & Filtering:**
+
+- **Print the last column of every line:**
+    
+    Bash
+    
+    ```
+    awk '{ print $NF }' file.txt
+    ```
+    
+- **Print lines longer than 80 characters:**
+    
+    Bash
+    
+    ```
+    awk 'length($0) > 80' file.txt
+    ```
+    
+- **Print lines matching "Error" or "Warning":**
+    
+    Bash
+    
+    ```
+    awk '/Error|Warning/' file.log
+    ```
+    
+
+**Math & Summaries:**
+
+- **Sum the values in the first column:**
+    
+    Bash
+    
+    ```
+    awk '{ sum += $1 } END { print sum }' numbers.txt
+    ```
+    
+- **Calculate the average of the first column:**
+    
+    Bash
+    
+    ```
+    awk '{ sum += $1 } END { print sum / NR }' numbers.txt
+    ```
+    
+- **Count the number of empty lines:**
+    
+    Bash
+    
+    ```
+    awk '/^$/ { count++ } END { print count }' file.txt
+    ```
+    
+
+**Text Manipulation:**
+
+- **Remove duplicate consecutive lines (simulates `uniq`):**
+    
+    Bash
+    
+    ```
+    awk 'a != $0; { a = $0 }' file.txt
+    ```
+    
+- **Number each line (simulates `cat -n`):**
+    
+    Bash
+    
+    ```
+    awk '{ print NR, $0 }' file.txt
+    ```
+    
+
+---

content/C++.md

@@ -0,0 +1,42 @@
+---
+tags:
+  - code
+  - notes
+  - docs
+  - School
+  - coding-notes
+  - CS-101
+  - public
+---
+# overview
+OOP language
+C code runs *almost* unchanged from C
+```embed
+title: "cplusplus.com"
+image: "https://cplusplus.com/favicon.ico"
+description: ""
+url: "https://cplusplus.com/"
+favicon: ""
+```
+```embed
+title: "W3Schools.com"
+image: "https://www.w3schools.com/images/w3schools_logo_436_2.png"
+description: "W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more."
+url: "https://www.w3schools.com/cpp/cpp_intro.asp"
+favicon: ""
+aspectRatio: "52.293577981651374"
+```
+
+```cpp
+#include <iostream>
+#include <stdexcept
+
+template <typename T>
+class Vector{
+	private:
+		T* data:
+		size_t sz;
+		size_t cap;
+}
+```
+$\approx$

content/Capture The Flag.md

@@ -0,0 +1,15 @@
+#public 
+
+all non-osint CTF challenges can be solved through recursive steps until a flag is found
+# 1. Explore
+Analyze any data in plain text for a flag, or for the next command to run such as the results of a program.
+>`cat problem.txt` 
+> `xxd -d asdasd238uasdkh`
+> `curl challenge.org/asd`
+
+Either solve the challenge with the flag, or determine the next program to execute
+# 2 replicate
+Build an isolated environment to replicate only the next program, and solve that step locally
+# 3 Inject
+Inject the payload that works on in the isolated environment 
+repeat Step  1

content/Cyber-Crime.md

@@ -1,7 +1,7 @@
 #public 
 - **Cyber Crime**: Use computer/digital device to further illegal ends
 > "nothings black and white in what we do, everything's got some gray"
-## Types of crime
+# Types of crime
  - **Crimes Against People**: A digital crime where the victim is a person
  - **Crimes Against Property**: A digital crime that damages, or illegally interacts with property
  - **Crimes Against Government**: A digital crime to  undermine the efficacy of a government
@@ -41,7 +41,7 @@ Nation-state attacks on power grids before Wars
 - **Sneaker Net**: Moving information across barriers physicality
 > proving an attack is one of the hardest questions to answer
 # U.S. National cyber strategy
- - **U.S. National cyber strategy**: anually updated policy document from the white house detailing the national cyber objectives
+ - **U.S. National cyber strategy**: annually updated policy document from the white house detailing the national cyber objectives
 
 > it has been similar last few years
 
@@ -55,13 +55,14 @@ Nation-state attacks on power grids before Wars
  - Shaping adversary behavior
  - regulatory environment
  - Federal government security
- - criticial infrastructure security
+ - critical infrastructure security
  - cyber skills workforce gap
 
-
+> How can you deter people outside of your country and laws? [[attack back]]
-
+> number of cyber jobs in US is increasing faster than the rate of new PHD grads
-
+
-
+# Identity Theft
+ - **Identity Theft**: Unlawful use of another's [Personally Identifiable Information][Definitiona/Personally Identifiable Information]
 
 
 

content/Discord ICS.md

@@ -0,0 +1,8 @@
+People submit week-at-a-galnce screenshots, or some form of their calendar. 
+Turn that into an ICS
+Plugin discord bot that recognizes 
+>/schedule @p1 @p2
+
+And finds available times to select. Then sends dm to users, emails them, and optional creates discord event
+
+#public 

content/Formulas.md

@@ -0,0 +1,45 @@
+#public
+# Work and energy
+| Formula                                | equation                                        | Usage                               |
+| -------------------------------------- | ----------------------------------------------- | ----------------------------------- |
+| Gravitational Potential Energy ($U_g$) | $U_g=mgh$                                       | Changes in height                   |
+| Kinetic Energy                         | $K=\frac{1}{2}mv^2$                             | Energy of motion                    |
+| Work-Energy Theorem                    | $\Delta E_{mec} = \Delta K+\Delta U=W_{other}*$ | calculating the effects of friction |
+
+
+| Variable | Symbol | SI Unit | Notes |
+| --- | --- | --- | --- |
+| Mass | m | kg | Convert from grams (g) if necessary. |
+| Height / Distance | h,d | m | Measures vertical or horizontal displacement. |
+| Velocity / Speed | v | m/s | Convert from km/h by dividing by 3.6.+3 |
+| Gravity | g | m/s2 | Earth's standard is approximately 9.8 m/s2. |
+| Energy / Work | $U_g$,K,W | J | 1 Joule = 1 kg⋅m2/s2. |
+
+# Center Of Mass (CM)
+| Formula                                | equation                                        | Usage                               |
+| -------------------------------------- | ----------------------------------------------- | ----------------------------------- |
+| Position of COM X| $x_{com}=\frac{1}{M}\sum_{i=1}^{n}M_ix_i$  | find COM X|
+| Position of COM Y| $y_{com}=\frac{1}{M}\sum_{i=1}^{n}M_iy_i$  | find COM Y| 
+| velocity of COM  | $v_{com}=\frac{\sum m_iv_i}{M}$            | find the Velocity of COM |
+
+| Variable | Symbol | SI Unit | Notes |
+| --- | --- | --- | --- |
+| Position (X or Y) | $x_{com},y_{com}$ | m | Coordinates on the Cartesian plane.+ 1|
+| Total Mass | M | kg | The sum of all individual masses (m1​+m2​+…) |
+| Velocity of CM | vcom​ | m/s | The speed at which the entire system's balance point moves |
+# Linear Momentum and impulse
+| Formula                                | equation                                        | Usage                               |
+| -------------------------------------- | ----------------------------------------------- | ----------------------------------- |
+| Linear Momentum | p = mv | find linear momentum |
+| Impulse | $J=\Delta p=F_{avg}\Delta t=\int F(t)dt$ | change in momentum. Also area under Force-time graph |
+| Conservation Law | $P_{initial}=P_{final}$ | if net external force is 0, totoal momentum is constant |
+| Elastic Collisions (1D) | $v_{1f}=(\frac{m_1-m_2}{m_1+m_2})v_i+(\frac{2m_2}{m_1+m_2})v_2i$| momentum and kinetic energy are conserved |
+| completely inelastic collisions | $m_1v_{1i}+m_2v_{2i}=(m_1+m_2)v_f$ | find situation where the objects stick together |
+
+
+| Variable | Symbol | SI Unit | Notes |
+| --- | --- | --- | --- |
+| Momentum | p | kg⋅m/s | Calculated as mass × velocity. |
+| Impulse | J | N⋅s | Also equivalent to kg⋅m/ s.|
+| Force | F | N | 1 Newton = 1 kg⋅m/s2.+2 |
+| Time | t,$\Delta$t | s | The duration of the force application.+1| 

content/Homework.md

@@ -0,0 +1,79 @@
+#public 
+# Homework
+
+Questions (P7.) 
+1. a
+	1. A. True
+	2. B. Order does not matter in sets
+2. MISSISSIPPI
+3. 
+	1. $\subseteq$
+	2. $\in$
+	3. $\subseteq$
+	4. $\in$
+	5. $\in$  x wrong $\emptyset$ is a $\subseteq$ of all sets
+	6. $\subseteq$
+4. 9. 
+	1. a) $\{S_4, S_5, S_9\}$
+	2. b) **??**
+	3. c) quadrillion
+	4. d) 
+		1. F
+		2. T (if order does not matter)
+		3. T
+		4. F
+		5. T
+		6. T
+		7. F
+		8. F
+		9. F
+		10. T
+		11. F
+		12. F
+		13. T
+		14. F
+		15. T
+		16. T
+5. 10.
+	1. $D_1=\{1\}, D_2=\{1,2\}, D_{10}=\{1,2,5\}$
+	2. b)
+		1. T
+		2. F
+		3. T
+		4. T
+		5. T?
+		6. F
+		7. T
+		8. F
+		9. F
+		10. F
+		11. F
+		12. T
+	3. c) $|D_{10}|=3$, $|D_{19}|=2$ 
+	4. D) $|\mathcal{D}|=9$
+
+
+| Questions                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             | Answer                                      |
+| --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------- |
+| 1. <br>	1. (a) True or false? {red, white, blue} = {white, blue, red}. <br>	2. (b) What is wrong with this statement: Red is the first element of the set {red, white, blue}?                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | a. True<br>b. Order does not matter in sets |
+| 2. Which has the larger cardinality? The set of letters in the word MISSISSIPPI or the set of letters in the word FLORIDA ?                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | MISSIPPI                                    |
+| 3. Fill in the blank with the appropriate symbol, ∈ or ⊆. <br>	1. (a) {1, 2, 3} {1, 2, 3, 4} <br>	2. (b) 3 {1, 2, 3, 4} <br>	3. (c) {3} {1, 2, 3, 4} <br>	4. (d) {𝑎} {{𝑎}, {𝑏}, {𝑎, 𝑏}} <br>	5. (e) ∅ {{𝑎}, {𝑏}, {𝑎, 𝑏}} <br>	6. (f) {{𝑎}, {𝑏}} {{𝑎}, {𝑏}, {𝑎, 𝑏}}                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |                                             |
+| 9. Let 𝑆1 = {𝑜, 𝑛, 𝑒}, 𝑆2 = {𝑡, 𝑤, 𝑜}, 𝑆3 = {𝑡, ℎ, 𝑟, 𝑒, 𝑒}, and so on. <br>	1. (a) Find all 𝑘 ∈ {1, 2, . . . , 10} with \|𝑆𝑘\| = 4. <br>	2. (b) Find distinct indices 𝑗, 𝑘 ∈ ℕ with 𝑆𝑗 = 𝑆𝑘. <br>	3. (c) Find the smallest value of 𝑘 ∈ ℕ with 𝑎 ∈ 𝑆𝑘. <br>	4. (d) Let 𝒮 = {𝑆𝑘}40 𝑘=1. Determine whether the following statements are true or false. <br>		1. (i) 𝑆13 = {𝑛, 𝑒, 𝑖, 𝑡, ℎ, 𝑒, 𝑟} <br>		2. (ii) {𝑛, 𝑒, 𝑡} ⊆ 𝑆20 <br>		3. (iii) 𝑆1 ∈ 𝒮 <br>		4. (iv) 𝑆3 ⊆ 𝒮 <br>		5. (v) ∅ ∈ 𝒮 <br>		6. (vi) ∅ ⊂ 𝒮 <br>		7. (vii) ∅ ⊆ 𝒮 <br>		8. (viii) 𝑆1 ⊆ 𝑆11 <br>		9. (ix) 𝑆1 ⊆ 𝑆21 <br>		10. (x) 𝑆1 ⊂ 𝑆21<br>		11. (xi) {𝑛, 𝑖, 𝑒} ∈ 𝒮 <br>		12. (xii) {{𝑓, 𝑜, 𝑢, 𝑟}} ⊆ 𝒮 <br>		13. (xiii) 𝑢 ∈ 𝑆40 <br>		14. (xiv) 𝒫(𝑆9) ⊆ 𝒫(𝑆19) <br>		15. (xv) {𝑠, 𝑖} ∈ 𝒫(𝑆6) <br>		16. (xvi) 𝑤 ∈ 𝒫(𝑆2) |                                             |
+| 10. For 𝑘 ∈ {1, 2, . . . , 20}, let 𝐷𝑘 = {𝑥 ∣ 𝑥 is a prime number which divides 𝑘} and let 𝒟 = {𝐷𝑘 ∣ 𝑘 ∈ {1, 2, . . . , 20}}.<br>	1. (a) Find 𝐷1, 𝐷2, 𝐷10, and 𝐷20. <br>	2. (b) True or False: <br>		1. (i) 𝐷2 ⊂ 𝐷10 <br>		2. (ii) 𝐷7 ⊆ 𝐷10 <br>		3. (iii) 𝐷10 ⊂ 𝐷20 <br>		4. (iv) ∅ ∈ 𝒟 <br>		5. (v) ∅ ⊂ 𝒟 <br>		6. (vi) 5 ∈ 𝒟 <br>		7. (vii) {5} ∈ 𝒟 <br>		8. (viii) {4, 5} ∈ 𝒟 <br>		9. (ix) {{3}} ⊆ 𝒟 <br>		10. (x) 𝒫(𝐷9) ⊆ 𝒫(𝐷6) <br>		11. (xi) 𝒫({3, 4}) ⊆ 𝒟 <br>		12. (xii) {2, 3} ∈ 𝒫(𝐷12) <br>	3. (c) Find \|𝐷10\| and \|𝐷19\|. <br>	4. (d) Find \|𝒟\|                                                                                                                                                                                                                                                                  |                                             |
+# Unit 1
+## Krish Hw 2
+1. A = {1, 2, 3}, B = {2, 3, 4} and C = {1, 2, 4}. List the elements of the specified set
+	1. (a) A ∩ B;  | {2,3}
+	2. (b) A ∪ B;  | {1,2,3,4}
+	3. (c) C\A; | {1}
+	4. (d) A ∪ (B ∩ C); | {2,1,3} 
+	5. (e) (A ∩ C) ∪ (B ∩ C); | {1,2,4}
+	6. (f) A × B; | {(1,2),(1,3),(1,4),(2,3),(2,2),(2,4),(3,2),(3,3),(3,4)}
+	7. (g) B × A;  | {(2,1),(2,2),(2,3),(3,1),(3,2),(3,3),(4,1),(4,2) ,(4,3)}
+	8. (h) (A × B) ∩ (B × A). | {(2,2),(3,3)}
+2. $M_2$ = {2, 4, 6, 8, 10, · · · } and $M_3$ = {3, 6, 9, 12, 15, · · · }. Find: 
+	1. (a) $M_2$ ∩ $M_3$; 
+		1. $M_6$
+	2. (b) $M_3 \backslash M_2$
+		1. $\{x|x=6k-3 \space\forall\space k \in\mathbb{N}\}$
+

content/Index.md

@@ -0,0 +1,9 @@
+---
+tags:
+  - public
+---
+# River Rooks.dev
+## Home for all of my creations ... eventually
+# Check out my notes
+
+# See [my git server](https://git.riverrooks.dev/venus) for all of my projects and dotfiles

content/Malware and cybersecurity.md

@@ -0,0 +1,57 @@
+#public 
+## Malware
+Malicious software: 
+> Software written to Do [[Harm]]
+## Harm
+- Devices
+- Data 
+	- Alter
+	- Modify
+	- Delete
+	- Corruption
+# Limit Access To Information
+## Privacy
+Limit the amount you permit to be shared
+### Healthcare
+I don't want public access to my info
+Choose certain info to release or not
+A trip to a crisis center is private
+### Personally Identifiable Information (PII)
+- Info that points Directly to you
+- Protect as Cyber Prof.
+
+## CIA Triad
+### Confidentiality
+Keep data hidden from those who should not access it
+- Encryption
+	- People who can see it, can't understand if there not supposed to
+- Hiding Existence
+Not the same as [[Malware and cybersecurity#Privacy|Privacy]]
+**Keep those who don't have access from having access**
+### Integrity
+Ensuring that Data and System Resources are trustworthy.
+Eliminate unauthorized tampering
+Eliminate accidental or malicious modifications.
+Examples:
+	Financial Records
+	Medical Records
+Can be more important than Confidentiality. 
+	Banking must be accurate, may be public 
+#### 3 Categories of integrity
+##### Data Integrity
+Ensuring that the data is trustworthy
+##### Origin Integrity
+Understanding the author and verifying the source
+The author created data and it has not been changed
+##### System Integrity
+Securing the processes that modify the data
+	Eliminate Accidental, deliberate, or malicious modifications of data through systems controlling that data
+### Availability
+Dealing with systems and data being available for use when needed 
+
+## Secrecy
+Information that should not be disclosed outside of an in-group
+	 `Maximum Secrecy = Minimun Availability`
+
+
+

content/Malware.md

@@ -0,0 +1,310 @@
+#public 
+# Malware/malicious software
+ - **Malware**: software written with intent to do HARM
+```mermaid
+flowchart TD
+    A[Data] <---> B[People]
+    A <---> C[Devices]
+    B <---> C
+```
+> Greatest Vulnerability is People
+## Malware types
+ - **Worm**: program that spreads itself
+ > diff b/t virus and worm is method of movement
+ - **Ransomware**: require payment to remove (often in exchange for decryption key)
+ - **Phishing**: Faking identity in order to build trust to encourage specific user behavior
+ - **DOS/DDOS**: (distributed) denial of service to overwhelm services and prevent legitimate activity from getting through
+## Virus 
+ - **Virus:** program to modify other programs
+### Trojan
+ - **Trojan**: an innocent program that hides malware inside
+ looks benign and can be anything from a bad link to a malicious PDF file.
+ Can contain any kind of other malware such as
+ - key loggers
+ - webcams
+###  Examples
+#### I love you
+ [wiki](https://en.wikipedia.org/wiki/ILOVEYOU)
+- $10 billion in damages,
+- 10% of worldwide competition
+- attacked other computers after spreading
+> at it's height, a third of the worlds computers were infected
+
+
+# Threat Actors
+| Group            | Motivations                                              |
+| ---------------- | -------------------------------------------------------- |
+| Nation States    | Intelligence Infrastructure                              |
+| Groups of people | Intimidate, org-goals                                    |
+| Individuals      | ego, \$\$\$, etc                                         |
+| Insider Threats  | Those inside of an organization who abuse trusted access |
+>Insider Threats are the Greatest challenge in cyber-sec
+
+> There is an upward trend in the amount of malware and damage done in USD. 5 month avg for identifying breaches
+
+# CIA TRIAD
+```mermaid
+flowchart TD
+    A[Confidentiality] <---> B[Integrity]
+    A <---> C[Accessibility]
+    B <---> C
+````
+True security manages all 3, our job is to find the right balance
+## CONFIDENTIALITY
+	Ensuring that only authorized users can access data
+### 3 Types of confidentiality
+| type            | definition                                                                 | exampe                    |     |
+| --------------- | -------------------------------------------------------------------------- | ------------------------- | --- |
+| Confidentiality | limiting access to information including the existence of such information | "What conversation"       |     |
+| Privacy         | Limit the information shared                                               | Not giving away PII       |     |
+| Secrecy         | Data not to be shared beyond small circle                                  | Restricting access to PII |     |
+ - **PII**: personally identifiable information
+## INTEGRITY
+    Ensure data and system resources are trustworthy
+    Trustworthy: known author, not maliciously modified
+    
+| Catagory | definition |
+| --- | --- |
+| Data integrity | Data has not been modified or overwritten |
+| Origin Integrity | maintaining the authorship and chain of editors |
+| System  integrity | overall design of processes that work with data |
+> While confidentiality is often considered the "Traditional" focus of security, Integrity can be considred just as important
+## AVAILABILITY
+Authorized users can access data and systems when needed.
+Confilicts directly with Confidentiality, this balance is our job.
+DDOS/DOS attacks affect availibility.
+> "If one person can have access, many have access"
+
+# What is security?
+> Just fire-walling/encrypting your system $\neq$ security
+
+**Security is a systems issue**, good security is a heuristic endeavor encompassing the following questions:
+ 1. What are we protecting?
+ 2. What can go wrong?
+ 3. What are we going to do about it?
+ 4. Did we do a good job?
+
+You need to deal with policy and procedure. E.G. talking to non-tech savvy people or encouraging more scrutiny of strange emails
+
+ - **Forensics:** determine what was done when
+```mermaid
+mindmap
+	id))system((
+		id(Hardware(
+		id(Software(
+		id)networking(
+
+```
+# The Five As
+| [[Malware#Authentication]] | Verification of a user's Identity            | static password           |
+| ------------------------ | -------------------------------------------- | ------------------------- |
+| Access control           | control who is allowed access to something   | ACT card                  |
+| [[Malware#Accounting]]     | keeping track of activity                    | logs of command history   |
+| [[Malware#Auditing]]       | checking for suspicious behavior or failures | log analysis              |
+| Action                   | taking action on a threat                    | changing a users password |
+
+
+## Authentication
+ > How do we know who you say you are? j do we know you're authorized?
+### 3 mechanism of authentication:
+| something you **know** | Static username and passwd                                           |
+| ---------------------- | -------------------------------------------------------------------- |
+| something you **have** | one time password (OTP) --> usually **2nd device** as authentication |
+| something you **are**  | Biometric credential                                                 |
+
+## Accounting
+ - cant have $\infty$ storage, so what do you keep?
+## Auditing
+You need to know your system is compromised if you're taksed to protect it.
+"Did something happen?"
+This is looking at logs created and making policies to take action of some kind
+    you also need to determine the action to take
+# measures and countermeasures
+| prevention | measures to **stop breaches**     | Gaurd at the gate, strong authentication policy |     |
+| ---------- | --------------------------------- | ----------------------------------------------- | --- |
+| detection  | measures to **detect breaches**   | beggining, ongoing, or afterwords               |     |
+| Reaction   | measures to **recover of assets** | Rebuild, Repair, Pursue                         |     |
+
+```mermaid
+flowchart TB
+id1[Passwords are easy to guess] --> id2[Password policies] --> id3[Users write down passwds] --> id4[etc]
+
+```
+# Insider threats
+ - **Threat**: An event of condition that has the potential to cause loss or undesirable consequences
+ - **Insider Threat**: threat caused by someone inside of the organization
+    - Disgruntled employee
+    - Careless employee
+
+|       |IT sabatoge| Theft of IP   | Fraud | Espionage |
+| ---   | ---       | ---           | ---   | ---       |
+| WHO   | techinal/priveleged access | scientists, programmers, engineers, sales | fincacial pros, low/mid developers, customer service | anybody |
+| WHEN | on/before termination | ~60 days b4 leaving | Long period of time |  long period of time |
+| WHY | revenge | new job, start company | Greed, financial need | dissatisfaction, greed, financial need |
+
+## Identifying Insider Threats:
+ - Who has the most access?
+    > Don't assume sysadmin is the villan, just be aware of their access level
+ - become the insider. "Think like the attacker" 
+ - most employees dont join to become insiders
+## Lifecycle of an insider
+ 1. Recruitment/tipping point
+ 2. Search/Reconnisance
+ 3. Acquisition/collection
+ 4. Exfiltration/Action
+
+# Threat Modeling
+> The equifax breach exploited a known vulnerability that equifax didn't patch for months. $1.4 Billion in damages 
+## The fundamental security problem
+There are more attacks than can be reasonably stopped with limited time/money
+## Why threat model
+ - Proactive vs Reactive
+ - Prioritization
+ - Systematic approach
+ - Find problem's you'd otherwise miss
+ - Legal compliance
+## The cost of a vulnerability
+![[Diagram 2.svg]]
+## What is threat modeling?
+A structured process to identify, quantify, and address security risks in a system or process
+## Key Questions
+ 1. What are we protecting
+ 2. What can go wrong
+ 3. What are we going to do about it
+ 4. did we do a good job
+## Steps
+ ### 1. define scopes and assets
+ ### 2. Create architecture diagram
+    - Data flow
+    - Network diagram
+    - Component diagram
+    - Trust breakdown diagram
+ ### 3. Identify threats
+| S     | spoofing Identity         |
+| ---   | ---                       |
+| T     | Tampering with data       |
+| R     | Repudation                |
+| I     | Information disclosure    |
+| D     | Denial of servie          |
+| E     | Escalation of privelege   |
+> [[Malware#CIA Triad]]
+
+ ### 4. Rank and prioritize threats
+
+#### DREAD 
+on a scale of 1 - 10
+Risk = (D+R+E+A+D)/5
+
+| D    | Damage potential  |
+| ---  | ---               |
+| R    | Reproducability   |
+| E    | Exploitability    |
+| A    | Affected Users    |
+| D    | Discoverability   |
+
+Ex: Mybama SQLI
+
+| D   | 10  |
+| --- | --- |
+| R   | 10  |
+| E   | 7   |
+| A   | 10  |
+| D   | 8   |
+R 9 = (10 + 10 + 7 + 10 + 8) / 5 
+9 is a **Critical threat**
+#### Impact/likelyhood table
+
+| likelyhood | low | med | high |
+| ---------- | --- | --- | ---- |
+| low        | 1   | 2   | 3    |
+| med        | 2   | 4   | 6    |
+| high       | 3   | 6   | 9    |
+
+| < 3   | < 6   | 9 |
+| ---   | ---   |---|
+| low, fix when possible | Vulnerable. Fix ASAP | HUGE PROBLEM |
+
+ ### 5. Determine Mitigation
+  1. **Eliminate**: remove the vuln --> unused admin page
+  2. **Mitigate**: Reduce likelihood of attack --> Sanitize SQL inputs
+  3. **Transfer**: Move to somewhere else --> send it to your SSO
+  4. **Accept**: It's good enough --> password logins (using microsoft)
+
+## Why it works:
+ 1. Systematic, not random
+ 2. Visual
+ 3. Collaborative
+ 4. Proactive
+ 5. Prioritized
+ 6. Documented
+
+# Encryption
+## Symmetric V. Asymmetric
+ - **Symmetric encryption**: Uses a single key
+ - **Asymmetric encryption**: Uses two keys
+
+```mermaid
+stateDiagram-v2
+    
+        state symmetric{
+        plaintext
+        }
+        state asymmetric{
+        text
+        key
+        }
+        text --> encryption
+        key --> encryption
+        encryption --> cyphertext 
+        plaintext --> encryption
+        cyphertext --> decryption
+        decryption --> Plaintext
+
+```
+### Asymmetric key encryption
+> Asymmetric has 2 keys and is more computationally expensive
+
+takes 2 keys, and runs the encryption algo on the combined input
+1 is the private key, one is the public
+    how do you securely send the keys?
+### Symmetric key encryption
+Cheaper, older and more common
+> Block cipher
+ - **DES**: Data Encryption Standard
+    - Oldest standard
+    - originally labbeled by NIST
+ - **AES**: Advanced Encryption Standard
+    - updated DES, more computationally signifigant for modern computing
+ - **3DES**: 3 Data Encryption Standard
+    - does DES 3 times
+ - **TLS**: Transport Layer security
+    - for high level web traffic 
+ - **SSL**: Secure Socket layer
+    - for secure communication between machine
+## Feistel block cipher
+Takes initial input, splits in half, encrypts left half, and switches. Repeats 
+The key is used in encryption through a reversable algorithm.
+![[Pasted image 20260217083518.png]]
+
+## Diffie Heiman Key exchange
+Symmetric means you have to pass around the key,
+Asymmetric is computationally expensive
+Diffie-Heiman is a solution
+ 1. Publish your public key
+ 2. Send hash function with any work you then publish
+ 3. Your public key can be used to verify integrety of any published work
+    3a. verifying file downloads
+    3b. git commits
+You can aslo force 1-way encryption with a block cipher so:
+data --> hash
+but not:
+hash --> data
+any slight change of input, dramatically changes output (Avalance effect)
+> since encryption methods take any size and hash it to a fixed size, collisions are possible. Furthermore, Collisions are going to be vastly different inputs
+
+## Hash functions
+ - Md5
+ - Sha1
+ - Sha3
+ - Sha256
+ - RSA

content/Unit 1 Sets and Logic.md

@@ -0,0 +1,157 @@
+---
+tags:
+  - Math-301
+  - Math
+  - School
+  - notes
+  - Spring-25
+  - public
+Slides: "[[Wed 1-7.pdf]]"
+Topic: Sets and Logic
+Unit: 1.1 - 1.6
+---
+# 1.1 Basic definitions
+A set is a collection of objects. The objects in a set are called its elements or members.
+> Let A={a,b,c}. 
+> $a\in A$ -- means *a* is an element of *A*
+> $d \notin A$ -- means *d* is not an element of *A*
+
+**Def**. the [[Cardinality]] of a finite set `S`, demoted `|S|`. is the number of elements in `S`.
+In the example, `|A|  = 3`.
+
+### Notation for some sets of numbers
+> Natural numbers: $\mathbb{N}$ = {1,2,3,...}
+> Whole Numbers: $\mathbb{W}$ = {0,1,2,3,...}
+> The set of integers: $\mathbb{Z}$ = {...-3,-2,-1,0,1,2,3,} = {0,1,-1,2,-2,3,-3...}
+> Rational Numbers: $\mathbb{Q}$  = $\{\frac{a}{b}\vert a,b\in\mathbb{Z},b\neq0\}$ 
+> Set of real numbers: $\mathbb{R}$
+---
+## 2 subsets
+
+- Let *A* and *B* be sets. We say that *B* is a [[subset]] of *A*, if every element of *B* is also an element of *A*, denoted $B\subseteq A$
+- Two sets are [[equal]], denoted $A = B$, if $A\subseteq B$  and $B\subseteq A$
+>Ex. Let *A* = $\{x\vert x\in\mathbb{Z}\hspace{7px}and\hspace{7px}0\lt x\lt6\}$.
+>We see that $A=\{1,2,3,4,5\}$.
+>Note: $1\in A, 4\in A$, but $6\notin A$.
+>$\{1,3,5\}\subseteq A,\{2\}\subseteq A$, but $\{2\}\notin A$ 
+>{2,4,6}$\subsetneq A$ since $6 \notin A$
+>|A| = 5.
+>Ex.  $\mathbb{N}\subseteq \mathbb{W} \subseteq \mathbb{Z} \subseteq \mathbb{Q} \subseteq \mathbb{R}$
+
+[[Proper subset]]: $B\subset A$ if $B\subseteq A$ and $B\neq A$   
+
+### Intervals of $\mathbb{R}$
+> (a,b) = {x$\in \mathbb{R}$ | a < x < b}, where  $-\infty\le a \le b \le\infty$
+> \[a,b] = {x$\in \mathbb{R}$ | a $\le$ x $\le$ b}, where  $-\infty\lt a \le b \lt\infty$
+> \[a,b) = \{x$\in \mathbb{R}$ | a $\le$ x < b}, where  $-\infty\lt a \lt b \le\infty$
+> \(a,b] = \{x$\in \mathbb{R}$ | a $\lt$ x $\le$ b}, where  $-\infty\le a \lt b \lt\infty$
+
+## 3. Collections of Sets
+The elements of a set may themselves be sets, and so is is a collections of sets
+> Ex. $\mathcal{C}$ = { {1}, {1, 2}, {1, 2, 3} }. Note that
+> {1} $\in \mathcal{C}$, {1,2} $\notin\mathcal{C}$, {1,2,3} $\in\mathcal{C}$ **??**
+> {1} $\subsetneq\mathcal{C}$ since $1\notin\mathcal{C}$
+> {{1}, {1,2}} $\subseteq\mathcal{C}$
+> {{1}, {1,2}} $\notin\mathcal{C}$.
+
+### Indexed Collection of Sets
+Let `I` be a set. Suppose $S_i$ is a set for each `i` $\in$ `I`. 
+Then we say that $\{S_i\}_{i\in I}$ = $\{S_i|i\in I\}$ Is called a [[collection of sets indexed]] by `I`.
+> Ex. Let $S_n$ = (n-1, n) for each $n\in\mathbb{N}$. Then
+> $\{S_n\}_{n=1}^{3}$ = {$S_1,S_2,S_3$} = $\{(0,1), (1,2), (2,3)\}$
+> $\{S_n\}_{n\in\mathbb{N}}$ =  $\{(0,1), (1,2), (2,3),...\}$
+
+## 4. The Empty Set
+Let `E` be a set with no elements. Then for any Set `A`, we have `E`$\subseteq$`A` [[(Vacuously True)]].
+If `E'` is another set with no elements, then `E`$\subseteq$`E'` `E'`$\subseteq$`E`   
+So `E`=`E'` Therefore, there is a unique set with no elements. We call it the [[empty set]], denoted by $\emptyset$ = {}. 
+**Property: For every set `A`, $\emptyset\subseteq$`A`.**
+
+## 5. The Power Set of a Set
+the [[power set]] of a set `S` is the collection of all subsets of `S` and is denoted $\wp(S)$.
+> $\wp(S) = \{A | A \subseteq S\}$.
+
+>Ex. Let $A$ = $\{a,b,c\}$. Then
+>$\wp(A)\{\emptyset\,\{a\},\{b\},\{c\},\{a,b\},\{a,c\},\{b,c\},\{a,b,c\}\}$
+>Note: |$\wp(A)$ = 8 = $2^3$ = $2^{|A|}$.
+
+## 6. Summarizing example
+Consider the set: 
+> $S = \{1,2,\emptyset,\{a,b\}\}$. Then
+> $2\in S, 2\subsetneq S$
+> ${2}\notin S, 2\subseteq S$
+> > $\emptyset, 2\subsetneq S$
+
+
+# 1.2 Set Operations
+## 1 Intersections and Unions
+>Let `A` and `B` be sets. The [[Intersection]] of `A` and `B` is the set.
+>$A\cap B$ {X | x $\in$ A and x $\in$ B}
+>![[Pasted image 20260114205835.png]] 
+
+The [[Union]] of `A` and `B` is the set 
+> $A \cup B$ = {x | $\in$ a A or x $\in$ B } ## "Or" is the "Inclusive or"
+> ![[Pasted image 20260114210548.png]] 
+
+> Ex. Let `A`={0,2,4,6,8}, `B`={0,3,6,9}, and C={1,2,3,4,5,6,8,9}. Then
+> (a) $A\cap B$ = {0,6}
+> (b) $A\cup B = \{0,2,4,6,8,3,9\}=\{0,2,3,4,6,8,9\}$ 
+> (c) $B\cap C$ = {3}
+> (d) $A\cup(B\cap C) = \{0,2,3,4,6,8\}$
+> (e) $(A\cup B)\cap C = \{2,3,4\}$
+> Note: $A\cup(B\cap C)\neq(A\cup B)\cap C$
+
+**Def. We say that two sets A and B and [[disjoint]] if $A\cap B=\emptyset$**
+![[Pasted image 20260115174934.png]]
+> **Theorem. Let `A` and `B` be finite sets.**
+> (a) $|A\cup B|=|A|+|B|-|A\cup B|$
+> ![[Pasted image 20260115175142.png]]
+> (b) if `A` and `B` and disjoint then  $|A\cup B| = |A| + |B|$
+> ![[Pasted image 20260115175132.png]]
+> (c) If $A\subseteq B, then |A|\leq|B|$
+## 2 Arbitrary Collections
+Let $\mathcal{C}=\{S_i|i\in I\}$ be a collection of sets indexed by a set `I` (Assume $I\neq0$.) Then the [[Intersection]] of $\mathcal{C}$ is defined as 
+> $\cap\mathcal{C}=\cap_{i\in I} S_i=\{x|x\in S_i$ for all $i\in I\}$.
+
+ The [[Union]] of the collection $\mathcal{C}$ is the set 
+>$\cup\mathcal{C}=$ $\cup_{i\in I}S_i=\{x|x\in S_i$ for at least one $i\in I\}$
+
+For a finite collection of sets indeed by $I=\{1,2 ... , n\}$
+we often write the intersection and unions of $\mathcal{C}=\{S_1,S_2, ... ,S_n\}$  as 
+> $\cap_{i=1}^n S_i = S_1\cap S_2\cap S_3\cap ... \cap S_n$
+> $\cup_{i\in I}^n S_i=S_1\cup S_2\cup ... \cup S_n$
+
+Def. Let $\{\S_i|i\in I\}$ be an indexed collection of sets. 
+> (a) The collection is [[Mutually disjoint]] if for all $i,j\in I$, if $S_i\neq S_j, then S_I =\cap S_j\space\emptyset$
+> Equivalently: for all $i,j\in I$, $S_i=S_j\space or\space S_i\cap S_j=\emptyset$
+> (b) The collection is [[nested]] if for all $i,j\in I$, $S_i\subseteq S_j$ or $S_j\subseteq S_i$
+
+
+
+$S=\{x\in\mathbb{W}|x\notin M_{5}, x\in M_3\}$
+
+
+
+
+
+---
+> $B_n$ = $\{x\in\mathbb{R}\space\vert\space |x| < n\}$
+
+$B_1$ = (-1,1)
+$B_2$ = (-2,2)
+$B_3$ =(-3, 3)
+
+
+> [!note] incluse vs exclusion
+$[-1,1]\neq (-1,1)$ where $n=\mathbb{R}$
+let $A$ = $(-1,1)$
+let $B$ = $[-1,1]$
+$A\subseteq B$
+$A\neq B$
+
+| Q                  | P                      | A                  |
+| ------------------ | ---------------------- | ------------------ |
+| Mutually disjoint? | $B_n\subseteq B_{n+1}$ | False              |
+| Nested?<br>        | $B_n\subseteq B_{n+1}$ | True               |
+| Intersect          | $B\cap B_n$            | $B_1$              |
+| Union<br>          | $B\cup B_n$            | $(-\infty,\infty)$ |

content/odo-test.md

@@ -0,0 +1,3 @@
+#public
+this is a doc
+# Md rendered to html

content/test.md

@@ -1,3 +0,0 @@
-# This is a test
-and this is p
-*italics*

public_vault/test.md

@@ -1,7 +0,0 @@
----
-public: "true"
-tags:
-  - public
----
-# This is a test
-and this is p

public_vault_builder/Dockerfile

@@ -1,14 +0,0 @@
-FROM python:3.12-slim
-
-
-run mkdir /public-vault
-
-WORKDIR /build
-
-COPY requirements.txt .
-
-RUN pip3 install -r requirements.txt
-
-COPY . .
-
-CMD ["python", "build.py"]

public_vault_builder/build.py

@@ -1,25 +0,0 @@
-from obsidian_parser import Vault
-import shutil
-from git import Repo
-
-
-# repo_url = "https://gitlab.com/username/my-vault.git"
-dest = "/content"
-src = "Personal-Wiki"
-# Load a vault
-vault = Vault(src)
-
-if vault:
-    print ("found vault")
-else:
-    print("could not find vault")
-
-# Find notes by exact name
-note = vault.get_note("test")
-
-# Findd all public notes
-publicNotes = vault.get_notes_with_tag("public")
-
-for note in publicNotes:
-    print(note.title)
-    shutil.copy2(f"{note.path}", dest)

public_vault_builder/requirements.txt

@@ -1,2 +0,0 @@
-obsidianmd-parser
-GitPython