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John D. Cook
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Latest posts
Last updated 2 days ago
Hilbert transform as an infinite matrix
2 days ago
The previous post linked to a post I wrote a few years...
Real and imaginary parts
2 days ago
The previous post announced some notes I wrote up based on an...
Building complex functions out of real parts
2 days ago
A couple months ago I wrote about how to compute the sine...
Couth and uncouth function pairs
4 days ago
“You can’t always get what you want. But sometimes you get what...
Circular and hyperbolic functions differ by rotations
4 days ago
The difference between a circular function and a hyperbolic function is a...
Closer look at an identity
6 days ago
The previous post derived the identity and said in a footnote that...
Approximating Markov’s equation
6 days ago
Markov numbers are integer solutions to x² + y² + z² =...
Recovering the state of xorshift128
10 days ago
I’ve written a couple posts lately about reverse engineering the internal state...
Initialize and print 128-bit integers in C
13 days ago
If you look very closely at my previous post, you’ll notice that...
Hacking the lehmer64 RNG
13 days ago
A couple days ago I wrote about hacking the Mersenne Twister. I...