• 0:00 - Intro
• 1:49 - Abstraction and Algebra
  • การ represent ตัวเลขบนเส้นจำนวน
    • representเป็น ratio = rational number
  • abstraction rational number = a/b
  • algebra = a study of abstractions applied to numbers
• 7:30 - Examples of Abstraction
  • algebra: number
  • group theory: symmetry
  • ring theory: arithmetic
  • graph theory: relationships
  • category theory: composition
• 8:49 - Set Theory สำหรับอธิบาย composition
• 13:25 - Category Theory
  • abstraction
  • associative
  • 16
  • composition
    • g o f = g follow f
• 21:16 - Outro

created on: Wed May 06 2026