[patch] LU solver

[Jules Bergmann]

This patch implements & tests the LU solver.  It uses LAPACK to perform 
the actual work.

More work went into writing the tests than the actual code!  I found a 
nice on-line book on "Numerical Computing in Matlab" by Cleve Moler (the 
MATLAB founder) that I cribbed the residual error bound from.  I put a 
link to the book on the VSIPL++ resource wiki.

				-- Jules
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: lu.diff
URL: <http://sourcerytools.com/pipermail/vsipl++/attachments/20050930/0fa79427/attachment.ksh>