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:INVERT

source files: [xc]tfm.[ch]

SYNTAX

(SEND <tfm> :INVERT)

DESCRIPTION

Replaces the contexnts of <tfm> by its multiplicative inverse. The code used is a brute-force thing grabbed from Graphics Gems, I would not be surprised if it is wildly numerically unstable. Be nice to adapt a fn from Numerical Recipes sometime.


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