======== readme for harwell ======= MA28 consists of four user callable routines for the solution of sparse linear equations where the coefficient matrix may be unsymmetric and numerical pivoting may be required for stability. A call to MA28AD must precede a call to MA28BD and a call to MA28AD or MA28BD must precede a call to MA28CD or MA28ID. The BLOCK DATA subprograms contained in the files blkdta000.f, blkdta001.f, and blkdta002.f initialize COMMON data and need to be linked with the other routines. Most of the Harwell Subroutine Library routines are in Fortran 77. A few are in Fortran 90. There are many packages for the solution of sparse linear and nonlinear equations (including MA48, which supersedes MA28). Further details can be found on WWW page: http://www.dci.clrc.ac.uk/Activity.asp?HSL The MA28 package is not in the public domain. It is part of the Harwell Subroutine Library, which is a general library of mathematical subroutines written in Fortran. A researcher may use MA28 without charge SOLELY for research purposes. For details of how to obtain an academic licence please contact the following: Lesley Vernon AEA Technology Engineering Software, Building 404, Harwell, Didcot, Oxfordshire OX11 QJ England email: HSL@aeat.co.uk Telephone: +44 1235 433824 Fax: +44 (0)1235 434294 Contact Lesley Vernon or Lawrence Daniels at the above address for further information, e.g. for embedding MA28 in software that is sold. ------- From: Iain Duff Date: Fri, 29 Sep 2000 17:05:17 +0100 (BST) Subject: Availability of HSL mathematical software HSL (formerly the Harwell Subroutine Library) We are delighted to announce the availability of many of our codes to the numerical analysis community. The details are below. Our codes and Web sites should be in place by Tuesday October 3rd. The commercial version of HSL 2000 will be launched by AEA Technology on October 16th. HSL 2000 ======== HSL (formerly the Harwell Subroutine Library) is a collection of ISO Fortran codes for large scale scientific computation written by members of the Numerical Analysis Group at Rutherford Appleton Laboratory and by other experts and collaborators. As the Library has evolved, many of the older packages have been superseded by newer versions, with increases in functionality, improved interfaces, or speed of execution. From October 2000, HSL will be divided into two parts, the main library, HSL 2000; and an archive, HSL Archive. The HSL Archive comprises packages that have either been superseded by more modern codes, or that we no longer feel able to support. Many new packages are to be introduced as part of the release of HSL 2000. These include new sparse matrix and optimization codes and new codes for use on parallel computers. Free use of HSL 2000 by UK academics ------------------------------------ While HSL 2000 continues to be a commercial product, it is now freely available for UK academics (those whose email address ends in .ac.uk, and who access the codes from a .ac.uk machine) for academic research or teaching purposes. This innovation is a direct result of much of the core funding for the Group being provided by a grant from EPSRC (GR/M78502). Free academic use of HSL Archive by everyone -------------------------------------------- In addition, the HSL Archive is now freely available to anyone (UK and elsewhere), so long as the codes are not then incorporated into a commercial product; no support is associated with free access to the HSL Archive. How to access the codes ----------------------- Access is by way of the HSL WWW page http://www.cse.clrc.ac.uk/Activity/HSL Access to both HSL 2000 (for .ac.uk) and the HSL Archive are by means of short-lived individual password-controlled accounts. Potential users are asked for brief details of the use they intend to make of the package(s) they aim to download. Users are also asked to accept a conditions-of-use form, and are not permitted to divulge their userid and password to anyone else, nor to distribute any codes they obtain to a third party. Information on the commercial use of HSL 2000 can be found by links from the above Web page. The RAL Numerical Analysis Group 29th September 2000