PDLAQR1 is a modied version of ScaLAPACK (version 1.8.0) routine PDLAHQR. In this note we summarize the differences between these routines. Some anomalies in the old routine are identied and fixed. We also implement some new features such as aggressive early deflation to improve the performance. The new routine is both faster and more reliable than the old one.
Page Responsible: Frank Drewes 2024-10-14