Fast eigensolver for dense real-symmetric matrices

A new eigensolver for dense real-symmetric matrices resulting from upgradin g and combining previous programs is tested for matrices of orders 100 to 2 000 on Cray YMP, Pentium, Mips RIx000 and Dee Alpha 21x64 single processors . Comparisons of execution times with the latest versions (November 1999) o f LAPACK routines are quite favorable, by a factor of two in most cases, wh ile requiring only one half as much memory and no special installation. (C) 2001 Elsevier Science B.V. All rights reserved.