We anticipate that a version of MA42 which exploits zeros and allows the user to specify the minimum pivot block size will be included in a future release of the Harwell Subroutine Library.
In this section, we compare the performance of the frontal code MA62 with other codes in the Harwell Subroutine Library that are also designed for solving symmetric positive-definite systems, namely the multifrontal code MA27 and the code VBAN, which is a development version of a new HSL code MA55.
The code, together with the ordering routines MC61 and MC63, is now available and will be included in the next release of the Harwell Subroutine Library. MA27 and MA42 are available in Release 12 of the HSL.
1990] and to a sequential Cholesky factorization subroutine from either LAPACK or the IBM Engineering and Scientific Subroutine Library (ESSL).
For block operations on the nodes we used IBM's Engineering and Scientific Subroutine Library (ESSL) version 2.2.
Engineering and Scientific Subroutine Library, Version 2 Release 2: Guide and Reference.