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  • Binary, Hanoi and Sierpinski, part 1

  • Euler's formula with introductory group theory

  • Fractals are not self-similar

  • Limits | Chapter 7, Essence of calculus

  • Linear combinations, span, and bases | Essence of linear algebra, chapter 2

  • Linear transformations and matrices | Essence of linear algebra, chapter 3

  • Pi hiding in prime regularities

  • Snell's law proof using springs

  • Tattoos on Math

  • The Brachistochrone, with Steven Strogatz

  • Three-dimensional linear transformations | Essence of linear algebra, footnote

  • Triangle of Power

  • Visualizing the chain rule and product rule | Chapter 4, Essence of calculus

  • Who cares about topology? (inscribed rectangle problem)