Linear algebra software on a vector computer

Mathematical software libraries (IMSL, NAG) supply subprograms for the solution of a broad class of frequently occurring numerical problems. Therefore, the library routines are normally used as building blocks in more complex computer codes. Users taking advantage of this approach can simplify code development and introduce expertise to their codes. The acceptance of mathematical software libraries is strongly related to the quality of their components. Results on the performance and accuracy of library subroutines for matrix multiplication, the solution of linear equations and eigenvalue problems on a CRAY X-MP are reported