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LU decomposition: backsubstitution available?

From: Thomas Hoffmann
Subject: LU decomposition: backsubstitution available?
Date: Wed, 25 Mar 1998 10:27:40 +0100 (MET)

It is a known procedure for the solution of a sequence of
systems of linear equations Ax=b with only varying rhs to
make once a LU decompostion of A (function lu() of octave)
and then backsubstitute for the several b's, e.g.
As e.g. RLaB has such an mechanism, I thought of similar
functionality in Octave, but did not find any.

Can anybody shed some light on this?


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