Flashnux

GNU/Linux man pages

• CentOS
• Debian
• Red Hat
• Ubuntu
• Unix

Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :

ISBN : 978-2-7460-9712-4
EAN : 9782746097124
(Editions ENI)

GNU/Linux	CentOS 4.8	i386
	csytrs(l)

---

CSYTRS

NAME
SYNOPSIS
PURPOSE
ARGUMENTS

---

NAME

CSYTRS - solve 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 CSYTRF

SYNOPSIS

	SUBROUTINE CSYTRS(		UPLO, N, NRHS, A, LDA, IPIV, B, LDB, INFO )
	CHARACTER		UPLO
	INTEGER		INFO, LDA, LDB, N, NRHS
	INTEGER		IPIV( * )
	COMPLEX		A( LDA, * ), B( LDB, * )

PURPOSE

CSYTRS 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 CSYTRF.

ARGUMENTS

UPLO (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 array, dimension (LDA,N)

The block diagonal matrix D and the multipliers used to obtain the factor U or L as computed by CSYTRF.

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 CSYTRF.

B (input/output) COMPLEX 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

---

---

csytrs(l)