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From TFM

This is a wiki full of stuff that I'm working on, or want to remember for later.

*a*+ 3 *b*+ *c*= 0 4 *a*+ 2 *b*+ 2 *c*= 0

where *A* = <math>\begin{bmatrix}
1 & 3 & 1 \\
4 & 2 & 2\end{bmatrix}</math>