This section contains various maths-related things.

Quick maths hack to get the correct per-pixel derivative of any value that is linear in worldspace.

This article describes how to quickly find the Nth root using basic arithmetic operations and floating-point bit-twiddling hacks.

You're going to use full-blown SVD just to get the pseudoinverse? Really?

How do all these matrix decompositions work, and how do you code them?

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)
```