ZSYTRS - Online Linux Manual Page

Section : 1
Updated : November 2008
Source : LAPACK routine (version 3.2)
Note : LAPACK routine (version 3.2)
NAMEZSYTRS - solves a system of linear equations A*X = B with a complex symmetric matrix A using the factorization A = U*D*U**T or A = L*D*L**T computed by ZSYTRF
SYNOPSISSUBROUTINE ZSYTRS(  UPLO, N, NRHS, A, LDA, IPIV, B, LDB, INFO )  CHARACTER UPLO  INTEGER INFO, LDA, LDB, N, NRHS  INTEGER IPIV( * )  COMPLEX*16 A( LDA, * ), B( LDB, * )
PURPOSEZSYTRS solves a system of linear equations A*X = B with a complex symmetric matrix A using the factorization A = U*D*U**T or A = L*D*L**T computed by ZSYTRF.
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. A (input) COMPLEX*16 array, dimension (LDA,N)  The block diagonal matrix D and the multipliers used to obtain the factor U or L as computed by ZSYTRF. LDA (input) INTEGER  The leading dimension of the array A. LDA >= max(1,N). IPIV (input) INTEGER array, dimension (N)  Details of the interchanges and the block structure of D as determined by ZSYTRF. 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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