PZPTTRS(l) | LAPACK routine (version 1.5) | PZPTTRS(l) |
NAME¶
PZPTTRS - solve a system of linear equations A(1:N, JA:JA+N-1) * X = B(IB:IB+N-1, 1:NRHS)SYNOPSIS¶
- SUBROUTINE PZPTTRS(
- UPLO, N, NRHS, D, E, JA, DESCA, B, IB, DESCB, AF, LAF, WORK, LWORK, INFO )
PURPOSE¶
PZPTTRS solves a system of linear equationswhere A(1:N, JA:JA+N-1) is the matrix used to produce the factors
stored in A(1:N,JA:JA+N-1) and AF by PZPTTRF.
A(1:N, JA:JA+N-1) is an N-by-N complex
tridiagonal symmetric positive definite distributed
matrix.
Depending on the value of UPLO, A stores either U or L in the equn A(1:N,
JA:JA+N-1) = U'D *U or L*D L' as computed by PZPTTRF.
Routine PZPTTRF MUST be called first.
12 May 1997 | LAPACK version 1.5 |