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pd1:<msdos.math>
LGSOLV1.ZIP Large Linear Systems solver
LGSOLV Version 1.00
Authors: P.G.Akishin, A.P.Sapoznikov. LCTA,JINR, Dubna,Russia.
E-mail: akishin@main1.jinr.dubna.su
sapoznikov@main1.jinr.dubna.su
The main problem for programmers working witn large matrices is how to keep
them in computer's memory. Being written in a disk-storage, matrix involves
a lot of disk exchanges, because all Matrix-Algorithms use it "row-by-row"
and "column-by-column" at the same time. Here we're proposing an original
modification of known Gauss method for pivot element elimination that uses
internal rows-transposition-vector and works with matrix strictly "col-by-col".
Our algorithm factorizes the source matrix so that created factor-matrix may
be used several times for quick solution of Linear System with any Right Parts.
LGSOLV consist of several FORTRAN-written functions, detaily described in
README.DOC file. Run file DEMOTEST.EXE is given as example of using LGSOLV.