A Search Engine for Statistics

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An integral theorem of Gauss

...Gauss proved in 1818 that the value of integral is unchanged if x... ...Maybe if we apply Gauss’ theorem again and again, the coefficients...

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El Salvador’s Bitcoin and Quantum Computing

...The treasury of El Salvador owns over 6,000 Bitcoins.... ...Yesterday El Salvador announced that it would split its funds into...

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How quantum computing would effect Bitcoin

...Bitcoin relies on two kinds of cryptography: digital signatures and... ...To be more specific, the kind of digital signatures used in Bitcoin...

johndcook.com > blog

Storing data in images

...that links to my Kingwood Data Privacy site.... ...James Burke hosted a BBC series called Connections in which he would... ...In this post we’ve connected Jupiter to Bitcoin. How?... ...discussing Ondřej’s experiment, which led to Golay codes, which...

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An uncrossed knight’s tour

...tour is part of the article Uncrossed Knight’s Tours in Donald Knuthâ... ...Cook....

johndcook.com > blog

Dithered QR codes

...Here’s one for my data privacy company, Kingwood Data Privacy LLC... ...I saw a post by Dave Richeson on Mastodon about making QR codes that...

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Probability of typing a wrong Bitcoin address

...Someone with the Caesarean handle Veni Vidi Vici on X asked What... ...There are several kinds of Bitcoin addresses....

johndcook.com > blog

Why are CUDA kernels hard to optimize?

...Older architectures like Sun Sparc or Cray vector processor, complex... ...from a slightly different angle, see this excellent work from Matt Sinclair...

johndcook.com > blog

Riemann's differential equation a P-symbol, P for Papperitz

...The symbol is also known as the Papperitz symbol because Erwin Papperitz... ...invented the symbol for expressing solutions to Bernard Riemann’...

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You can’t have everything you want: beta edition