Maths
This section contains various maths-related things.
Pixel-perfect Derivatives on GPU
Quick maths hack to get the correct per-pixel derivative of any value that is linear in worldspace.
Finding the Nth Root
This article describes how to quickly find the Nth root using basic arithmetic operations and floating-point bit-twiddling hacks.
Finding the Exact Pseudoinverse
You're going to use full-blown SVD just to get the pseudoinverse? Really?
Matrix Decomposition for Dummies
How do all these matrix decompositions work, and how do you code them?
When Is This Expression True?
When is this expression true for random variables A, B and C?
p(A|C) = p(A|B)p(B|C) + p(A|!B)p(!B|C)