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Re: [Help-gsl] Matrix / Vector multiplication


From: Paul C. Leopardi
Subject: Re: [Help-gsl] Matrix / Vector multiplication
Date: Sun, 11 Feb 2007 23:00:18 +1100
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On Sun, 11 Feb 2007, Patrick Alken wrote:
> > gsl_blas_dgemv?!?  Holy smokes!  No wonder I had a hard time finding it.
> > Has anyone thought of renaming this function something like
> > "gsl_matrix_multiply()"?
>
> The "basic" linear algebra functions like matrix*matrix, matrix*vector
> etc are done in a separate "BLAS" (Basic Linear Algebra Subprograms)
> library. The naming convention is confusing since I believe its
> from the old fortran conventions, but the "mv" means matrix*vector.
> The "d" means double precision and I don't off hand know what the ge
> means, but you can read the blas docs for more info.

The "ge" means general matrix, as opposed to symmetric, etc. matrix.
See eg http://www.netlib.org/blas/blas2-paper.ps




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