ZSPTRS - Online Linux Manual Page

Section : 1
Updated : November 2008
Source : LAPACK routine (version 3.2)
Note : LAPACK routine (version 3.2)
NAMEZSPTRS - solves a system of linear equations A*X = B with a complex symmetric matrix A stored in packed format using the factorization A = U*D*U**T or A = L*D*L**T computed by ZSPTRF
SYNOPSISSUBROUTINE ZSPTRS(  UPLO, N, NRHS, AP, IPIV, B, LDB, INFO )  CHARACTER UPLO  INTEGER INFO, LDB, N, NRHS  INTEGER IPIV( * )  COMPLEX*16 AP( * ), B( LDB, * )
PURPOSEZSPTRS solves a system of linear equations A*X = B with a complex symmetric matrix A stored in packed format using the factorization A = U*D*U**T or A = L*D*L**T computed by ZSPTRF.
ARGUMENTSUPLO (input) CHARACTER*1  Specifies whether the details of the factorization are stored as an upper or lower triangular matrix. = 'U': Upper triangular, form is A = U*D*U**T;
= 'L': Lower triangular, form is A = L*D*L**T. N (input) INTEGER  The order of the matrix A. N >= 0. NRHS (input) INTEGER  The number of right hand sides, i.e., the number of columns of the matrix B. NRHS >= 0. AP (input) COMPLEX*16 array, dimension (N*(N+1)/2)  The block diagonal matrix D and the multipliers used to obtain the factor U or L as computed by ZSPTRF, stored as a packed triangular matrix. IPIV (input) INTEGER array, dimension (N)  Details of the interchanges and the block structure of D as determined by ZSPTRF. B (input/output) COMPLEX*16 array, dimension (LDB,NRHS)  On entry, the right hand side matrix B. On exit, the solution matrix X. LDB (input) INTEGER  The leading dimension of the array B. LDB >= max(1,N). INFO (output) INTEGER  = 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value 0
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