3Blue1Brown mailing list

January 2026

The Hairy Ball Theorem

A few surprising applications of one of the most absurdly named theorems in topology, together with a beautiful proof for why it is true.

Jan 31 • Grant Sanderson

227

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SoME4 Prizes

Winners of the supplementary "helpful for teachers" prize we set up for the 2025 Summer of Math Exposition

Jan 16 • Grant Sanderson

88

4

5

December 2025

November 2025

How Laplace transforms solve differential equations

Studying the forced oscillator

Nov 5, 2025 • Grant Sanderson

161

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October 2025

But what is a Laplace Transform?

Visualizing the most important tool for differential equations.

Oct 12, 2025 • Grant Sanderson

248

4

11

Why complex exponents matter

Laplace Transform Prelude

Oct 5, 2025 • Grant Sanderson

113

9

6

September 2025

Why Ruler and Compass?

The fifth and final guest video

Sep 18, 2025 • Grant Sanderson

57

3

2

Exploration & Epiphany

A guest video about Sol LeWitt's incomplete open cubes, and the group theory behind it.

Sep 7, 2025 • Grant Sanderson

60

3

1

August 2025

Simulating Phase Change

Guest video by Vilas Winstein

Aug 28, 2025 • Grant Sanderson

131

1

8

The AI that solved IMO Geometry Problems

Guest video by Aleph0 ​

Aug 17, 2025 • Grant Sanderson

135

3

10

July 2025

But how do AI videos actually work?

Guest video by from Welch Labs

Jul 25, 2025 • Grant Sanderson

248

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