Solve a system of linear equations a(1:n, ja:ja+n-1) * x = b(ib:ib+n-1, 1:nrhs)
SUBROUTINE PDPTTRS(
N, NRHS, D, E, JA, DESCA, B, IB, DESCB, AF, LAF, WORK, LWORK, INFO )
INTEGER
IB, INFO, JA, LAF, LWORK, N, NRHS
INTEGER
DESCA( * ), DESCB( * )
DOUBLE
PRECISION AF( * ), B( * ), D( * ), E( * ), WORK( * )
PDPTTRS solves a system of linear equations
where 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 PDPTTRF.
A(1:N, JA:JA+N-1) is an N-by-N real
tridiagonal symmetric positive definite distributed
matrix.
Routine PDPTTRF MUST be called first.