# chetrs_aa.f - Man Page

## Synopsis

### Functions/Subroutines

subroutine chetrs_aa (UPLO, N, NRHS, A, LDA, IPIV, B, LDB, WORK, LWORK, INFO)
CHETRS_AA

## Function/Subroutine Documentation

### subroutine chetrs_aa (character UPLO, integer N, integer NRHS, complex, dimension( lda, * ) A, integer LDA, integer, dimension( * ) IPIV, complex, dimension( ldb, * ) B, integer LDB, complex, dimension( * ) WORK, integer LWORK, integer INFO)

CHETRS_AA

Purpose:

``` CHETRS_AA solves a system of linear equations A*X = B with a complex
hermitian matrix A using the factorization A = U*T*U**H or
A = L*T*L**H computed by CHETRF_AA.```
Parameters:

UPLO

```          UPLO is 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*T*U**H;
= 'L':  Lower triangular, form is A = L*T*L**H.```

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)
Details of factors computed by CHETRF_AA.```

LDA

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

IPIV

```          IPIV is INTEGER array, dimension (N)
Details of the interchanges as computed by CHETRF_AA.```

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).```

WORK

`          WORK is DOUBLE array, dimension (MAX(1,LWORK))`

LWORK

```          LWORK is INTEGER, LWORK >= MAX(1,3*N-2).

param[out] INFO
verbatim
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 2017

Definition at line 131 of file chetrs_aa.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

The man page chetrs_aa(3) is an alias of chetrs_aa.f(3).

Tue Nov 14 2017 Version 3.8.0 LAPACK