1
The scientific “unit” we call the decibel
Celebrating a rare dumpster fire in the kingdom of science.
Michał Zalewski (lcamtuf)
geek culture, algorithms, electronic circuit design, and chainsaw safety tips. Click to read lcamtuf’s thing, a Substack publication with thousands of subscribers.
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Visit lcamtuf.substack.com → RSS feedOn Hacker News Oct 2022 – Jul 2026
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2
Sir, there's a cat in your mirror dimension
Pets do the darndest things, especially if you teach them a bit of math.
3
Conway's Game of Life, in real life
When life gives you switches...
4
Folks, we have the best π
And some novel ideas for bicycle wheel design.
5
Is the frequency domain a real place?
Dissing Fourier, exploring the Hadamard-Walch transform, and making square-wave spectrograms.
6
Sierpiński Triangle? In My Bitwise and?
Exploring a peculiar bit-twiddling hack at the intersection of 1980s geek sensibilities.
7
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.
8
How many dimensions is this?
A degree in mathematics might not save you from stacking boxes for a living.
9
Not so fast, Mr. Fourier
A real explanation of discrete Fourier transform (DFT, FFT), discrete cosine transform (DCT), and their inverses.
10
You gotta think outside the hypercube
A closer look at the tesseract and the ways we can render it on the screen.