lcamtuf’s thing

What's the deal with Euler's identity?

Untangling a cursed formula from 1748.

Nov 8

21

1

1

Things you can do with diodes

Paying homage to the component we usually don't think about.

Nov 2

32

4

2

October 2025

Weekend projects: Chicken Squisher 3000

If it clucks like a duck...

Oct 14

30

7

3

September 2025

Zombies

Interior of an abandoned, boarded-up convenience store.

Sep 29

24

5

How has mathematics gotten so abstract?

What's the meaning of "numbers" and "arithmetic operations"? We consult Georg Cantor's turtles and look at Giuseppe Peano's code.

Sep 27

34

14

1

Folks, we have the best π

And some novel ideas for bicycle wheel design.

Sep 15

58

10

2

Getting silly with C, part ~(~1<<1)

It's vibe coding. Relax, everyone is doing it.

Sep 7

22

2

How many dimensions is this?

A degree in mathematics might not save you from stacking boxes for a living.

Sep 3

31

5

July 2025

Multitudes

A warm, late-summer night in Bruges.

Jul 14

18

2

June 2025

Gödel's beavers, or the limits of knowledge

Can you examine infinitely many integers in finite time? Are there numbers you're not allowed to know? Can a monkey beat a beaver in a fair fight?

Jun 30

43

13

9

Self-referential abstractions

A quick look at the wacky epistemology of analog circuitry.

Jun 6

24

8

1

The proof that π = 4

Recreational math: why a troll proof involving circles is less wrong than it seems.

Jun 5

21

5

3