dpotrs.f (3) Linux Manual Page

dpotrs.f –

Synopsis

Functions/Subroutines

subroutine dpotrs (UPLO, N, NRHS, A, LDA, B, LDB, INFO)
DPOTRS

Function/Subroutine Documentation

subroutine dpotrs (characterUPLO, integerN, integerNRHS, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldb, * )B, integerLDB, integerINFO)

DPOTRS

Purpose:

 DPOTRS solves a system of linear equations A*X = B with a symmetric

 positive definite matrix A using the Cholesky factorization

 A = U**T*U or A = L*L**T computed by DPOTRF.

 

Parameters:

UPLO

 UPLO is CHARACTER*1

 = ‘U’: Upper triangle of A is stored;

 = ‘L’: Lower triangle of A is stored.

N

 N is INTEGER

 The order of the matrix A. N >= 0.

NRHS

 NRHS is INTEGER

 The number of right hand sides, i.e., the number of columns

 of the matrix B. NRHS >= 0.

A

 A is DOUBLE PRECISION array, dimension (LDA,N)

 The triangular factor U or L from the Cholesky factorization

 A = U**T*U or A = L*L**T, as computed by DPOTRF.

LDA

 LDA is INTEGER

 The leading dimension of the array A. LDA >= max(1,N).

B

 B is DOUBLE PRECISION array, dimension (LDB,NRHS)

 On entry, the right hand side matrix B.

 On exit, the solution matrix X.

LDB

 LDB is INTEGER

 The leading dimension of the array B. LDB >= max(1,N).

INFO

 INFO is INTEGER

 = 0: successful exit

 < 0: if INFO = -i, the i-th argument had an illegal value

 

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

November 2011

Definition at line 111 of file dpotrs.f.

Author

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