HP MLIB User's Guide Vol. 2 7th Ed.

768 HP MLIB LAPACK User’s Guide
pdgsrfs/pzgsrfs Improve the computed solutions to systems of distributed linear equations
stat
(output)
Record the statistics about the refinement steps.
info
(output) = 0
: successful exit
> 0: if info= -i, the i-th argument had an illegal value.