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The Gaussian Processes Web Site, created seemingly by the guys who wrote the seeming bible of gaussian processes as they relate to machine learning.

I’m afraid it might be good bedtime reading.

David MacKay: Information Theory, Inference, and Learning Algorithms: Humour
: “Comparison of Information Theory, Inference, and Learning Algorithms with Harry Potter”

The site for those who are debating buying a Harry Potter book or buying a machine leaerning book by David Mackay and need a little help in comparing the two.

Project Euler: 188 little programming math problems to amuse you.

Vadim Bultiko site has a cool paper by Paul Rendell on creating a Turing Machine in Life. I didn’t get to read it all in detail yet, but this looks pretty clever.

There is a lot more, including the data and patterns, on Paul Rendell’s site.

Some amusing comics from the XKCD strip, found at Classic XKCD strips. I particularly like the one above. And it is true, check at Google Calculator. But what does it mean?

This was originally found via a Silicon Valley Patterns mailing list post about a programming puzzle at: Facebook for their engineering candidates.

Theoretical Computer Science Cheat Sheet. Actually, it is a handy collection of all kinds of useful formulas.

(Via Lambda the Ultimate.)

The Poincaré Project is one guy’s effort and journey towards understanding the math necessary to understand Grigori Perelman’s proof of the Poincaré Conjecture (another description here.)

It’s a whole bunch of math that I don’t know, but so far I am following what he says (I’m about half-way through.)

(Via Anarchaia.)

Giant Steps by Michal Levy is a very slick, very cool animation to John Coltrane’s Giant steps.

(Via Projectionist.)

I never realized that there was such a handy tool available at the command line before. D’oh. That is great.

FOLLOWUP: It doesn’t do temperatures, only straight multiplicative conversions. Still handy.

UNITS(1)                  BSD General Commands Manual                 UNITS(1)
NAME
     units -- conversion program
SYNOPSIS
     units [-f filename] [-qv] [from-unit to-unit]

[segovia:~] bobevans% units
500 units, 54 prefixes
You have: 2 pints
You want: cups
        * 4
        / 0.25
You have: 2 imperial pints
You want: cups
        * 4.8038
        / 0.20816853
You have: 4 quarts
You want: bushels
        * 0.10742088
        / 9.3091775
You have: .25 acres
You want: feet * feet
        * 10890
        / 9.1827365e-05
You have: 

Distance Measures for vectors. Various strategies you might use with pointers to discussions of why you might choose one over another.

(Via Anarchaia.)