subroutines on demand

[David G. Hough at validgh]

FROM NA-NET:

From: P. Knijnenburg <peterkaCS.LeidenUniv.NL> 
Date: Tue, 2 Jul 1996 17:06:46 +0200 (METDST)
Subject: Subroutine On Demand Service

              Subroutine On Demand-service

The Computer and Software Systems group of the Department of Computer Science
at Leiden University proudly presents a new WWW service.


In the mathematical software community, it has been widely accepted
that adopting a library of basic routines for problems in linear
algebra can help in improving the clarity, portability, modularity,
maintenance, robustness, and even the efficiency of mathematical
software.  Examples of such libraries include Level 1, 2, 3 BLAS, 
EISPACK, LINPACK, LAPACK etc.  These libraries mainly deal with 
dense matrices.  A similar approach can be taken for mathematical
software that deals with general sparse matrices.  The package
SPARSKIT provides many primitives for working with sparse matrices.

Developing, optimizing, and maintaining sparse software by hand
is an error-prone and complex task. In an attempt to resolve
these problems, the group at Leiden has proposed an alternative approach
to the development of sparse software. Rather than dealing with
the sparsity of matrices at programming level, the sparsity is dealt with 
at compilation level. A special kind of restructuring compiler, 
referred to as a sparse compiler, automatically transforms a dense 
program into efficient sparse code that operates on sparse storage schemes.  

This experimental service provides you with an interface to our
sparse compiler and allows you to obtain sparse versions of
Level 2 BLAS and Level 3 BLAS subroutines.  The compiler transforms 
the program into a sparse version which is then sent back to you.

The Subroutine On Demand-service can be accessed through the following URL: 
http://hp137a.wi.leidenuniv.nl:8080/blas-service/blas.html

We hope to welcome you to our service,

Best regards,

Aart J.C. Bik
Peter J.H. Brinkhaus 
Peter M.W. Knijnenburg 
Harry A.G. Wijshoff