Resources
A Primer on Bézier Curves: A free, online book for when you really need to know how to do Bézier things.
http://pomax.github.io/bezierinfo/
Matrix Differentiation ( and some other stuff )
http://www.atmos.washington.edu/~dennis/MatrixCalculus.pdf
MathBox: Tools for Thought: Graphical Algebra and Fourier Analysis
https://acko.net/files/gltalks/toolsforthought/#0