Function Svd-Matrix-Inverse
(
svd-matrix-inverse < a > &optional < singularity-threshold > )
Use singular value decomposition to compute the inverse of `A.' If an exact
inverse is not possible, then zero the otherwise infinite inverted singular
value and compute the inverse. The inverse is returned; `A' is not destroyed.
If you're using this to solve several systems of equations, you're better off
computing the singular value decomposition and using it several times, because
this function computes it anew each time.