1ZPOTRS(1)                LAPACK routine (version 3.2)                ZPOTRS(1)
2
3
4

NAME

6       ZPOTRS  -  solves a system of linear equations A*X = B with a Hermitian
7       positive definite matrix A using the Cholesky factorization A =  U**H*U
8       or A = L*L**H computed by ZPOTRF
9

SYNOPSIS

11       SUBROUTINE ZPOTRS( UPLO, N, NRHS, A, LDA, B, LDB, INFO )
12
13           CHARACTER      UPLO
14
15           INTEGER        INFO, LDA, LDB, N, NRHS
16
17           COMPLEX*16     A( LDA, * ), B( LDB, * )
18

PURPOSE

20       ZPOTRS  solves  a  system  of linear equations A*X = B with a Hermitian
21       positive definite matrix A using the Cholesky factorization A =  U**H*U
22       or A = L*L**H computed by ZPOTRF.
23

ARGUMENTS

25       UPLO    (input) CHARACTER*1
26               = 'U':  Upper triangle of A is stored;
27               = 'L':  Lower triangle of A is stored.
28
29       N       (input) INTEGER
30               The order of the matrix A.  N >= 0.
31
32       NRHS    (input) INTEGER
33               The  number of right hand sides, i.e., the number of columns of
34               the matrix B.  NRHS >= 0.
35
36       A       (input) COMPLEX*16 array, dimension (LDA,N)
37               The triangular factor U or L from the Cholesky factorization  A
38               = U**H*U or A = L*L**H, as computed by ZPOTRF.
39
40       LDA     (input) INTEGER
41               The leading dimension of the array A.  LDA >= max(1,N).
42
43       B       (input/output) COMPLEX*16 array, dimension (LDB,NRHS)
44               On  entry, the right hand side matrix B.  On exit, the solution
45               matrix X.
46
47       LDB     (input) INTEGER
48               The leading dimension of the array B.  LDB >= max(1,N).
49
50       INFO    (output) INTEGER
51               = 0:  successful exit
52               < 0:  if INFO = -i, the i-th argument had an illegal value
53
54
55
56 LAPACK routine (version 3.2)    November 2008                       ZPOTRS(1)
Impressum