A symbol representing the blue rose.

Mathematics

For me, math is the hardest subject, but the most necessary one.

Arithmetic
Geometry (PAGE COMING SOON)
Calculus (PAGE COMING SOON)

Mathematical Beauty

"Mathematics, rightly viewed, 
 possesses not only truth, but supreme beauty
 -a beauty cold and austere, like that of sculpture, 
 without appeal to any part of our weaker nature, 
 without the gorgeous trappings of painting or music, 
 yet sublimely pure, and capable of a stern perfection 
 such as only the greatest art can show."  

    - Bertrand Russell

Mathematical beauty is the aesthetic pleasure typically derived from the abstractness, purity, simplicity, depth or orderliness of mathematics.

Mathematicians describe an especially pleasing method of proof as elegant. Depending on context, this may mean:

Links

The Mathematical Functions Grimoire
Red Blob Games
Maths & trigonometry cheat sheet for 2D & 3D games
How to use the Slide Rule
Mathigon
Fractalus
Cut The Knot
My Reckonings
Solipsys
The Math Doctors
toywiki
A First Course in Linear Algebra
Notation As A Tool of Thought
Wolfram MathWorld
Discrete Mathematics: An Open Introduction
Topics in Maths
Think in Math. Write in Code
Pascal's Triangle

Physics

!Feynman Lectures
HyperPhysics
John Baez
The Theoretical Minimum

Youtube

Visual Algebra
Kerry Shirts
Outside In (newer version)

Memories

2020-11-20: "I have kind of a problem with math. I've been homeschooled by my parents for pretty much my entire life, & that means the quality of my education hinges on their ability to teach. While most of the time my math "class" has kept me up to an age-appropriate level, my parents' teaching ability has decreased as they have gotten increasingly busy & had more kids. Nowadays math is almost fully absent from my education." (Source)