.TH PCPTSV l "12 May 1997" "LAPACK version 1.5" "LAPACK routine (version 1.5)" .SH NAME PCPTSV \- solve a system of linear equations A(1:N, JA:JA+N-1) * X = B(IB:IB+N-1, 1:NRHS) .SH SYNOPSIS .TP 19 SUBROUTINE PCPTSV( UPLO, N, NRHS, D, E, JA, DESCA, B, IB, DESCB, WORK, LWORK, INFO ) .TP 19 .ti +4 CHARACTER UPLO .TP 19 .ti +4 INTEGER IB, INFO, JA, LWORK, N, NRHS .TP 19 .ti +4 INTEGER DESCA( * ), DESCB( * ) .TP 19 .ti +4 COMPLEX B( * ), E( * ), WORK( * ) .TP 19 .ti +4 REAL D( * ) .SH PURPOSE PCPTSV solves a system of linear equations where A(1:N, JA:JA+N-1) is an N-by-N complex .br tridiagonal symmetric positive definite distributed .br matrix. .br Cholesky factorization is used to factor a reordering of .br the matrix into L L'. .br See PCPTTRF and PCPTTRS for details. .br