CPOTRS(3)

📦 version 3.12.0, in opensuse-leap 16.0

💖 CPOTRS(3) 💖

Bestie, welcome to the Library Functions Manual entry for CPOTRS — the LAPACK subroutine that solves the system after CPOTRF has done its Cholesky thing. ✨

🌸 NAME 🌸

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/SRC/cpotrs.f

💫 SYNOPSIS 💫

Functions/Subroutines

subroutine CPOTRS (uplo, n, nrhs, a, lda, b, ldb, info)
    CPOTRS

🦋 Function/Subroutine Documentation 🦋

CPOTRS

subroutine CPOTRS (character uplo, integer n, integer nrhs, complex,
    dimension( lda, * ) a, integer lda, complex, dimension( ldb, * ) b,
    integer ldb, integer info)
    CPOTRS

CPOTRS — the icon herself. 💅

Purpose

Okay so, CPOTRS solves a system of linear equations A*X = B with a Hermitian positive definite matrix A using the Cholesky factorization A = U**H*U or A = L*L**H computed by CPOTRF. No cap. 💅

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 COMPLEX array, dimension (LDA,N)

The triangular factor U or L from the Cholesky factorization A = U**H*U or A = L*L**H, as computed by CPOTRF.

LDA

LDA is INTEGER

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

B

B is COMPLEX 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.

Definition at line 109 of file cpotrs.f.

Definition at line 109 of file cpotrs.f.

Author

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