3Blue1Brown mailing list

But what is cross-entropy?

Compression is Intelligence Part 2

Jul 16 • Grant Sanderson

124

5

13

June 2026

On monthly puzzles

And the plan for their solutions

Jun 17 • Grant Sanderson

118

5

8

Reinventing Entropy

Compression & Intelligence Part 1

Jun 7 • Grant Sanderson

489

19

19

March 2026

Escher's most mathematically interesting piece

The Print Gallery, and the tour of complex analysis it invites.

Mar 22 • Grant Sanderson

358

12

25

February 2026

The most underappreciated formula

Exploring spheres in higher dimensions

Feb 27 • Grant Sanderson

167

8

9

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

289

7

14

SoME4 Prizes

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

Jan 16 • Grant Sanderson

98

4

5

December 2025

November 2025

How Laplace transforms solve differential equations

Studying the forced oscillator

Nov 5, 2025 • Grant Sanderson

193

2

5

October 2025

But what is a Laplace Transform?

Visualizing the most important tool for differential equations.

Oct 12, 2025 • Grant Sanderson

303

5

13

Why complex exponents matter

Laplace Transform Prelude

Oct 5, 2025 • Grant Sanderson

129

9

8

September 2025

Why Ruler and Compass?

The fifth and final guest video

Sep 18, 2025 • Grant Sanderson

65

3

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