Contents
zhptrs - solve a system of linear equations A*X = B with a
complex Hermitian matrix A stored in packed format using the
factorization A = U*D*U**H or A = L*D*L**H computed by
ZHPTRF
SUBROUTINE ZHPTRS(UPLO, N, NRHS, A, IPIVOT, B, LDB, INFO)
CHARACTER * 1 UPLO
DOUBLE COMPLEX A(*), B(LDB,*)
INTEGER N, NRHS, LDB, INFO
INTEGER IPIVOT(*)
SUBROUTINE ZHPTRS_64(UPLO, N, NRHS, A, IPIVOT, B, LDB, INFO)
CHARACTER * 1 UPLO
DOUBLE COMPLEX A(*), B(LDB,*)
INTEGER*8 N, NRHS, LDB, INFO
INTEGER*8 IPIVOT(*)
F95 INTERFACE
SUBROUTINE HPTRS(UPLO, [N], [NRHS], A, IPIVOT, B, [LDB], [INFO])
CHARACTER(LEN=1) :: UPLO
COMPLEX(8), DIMENSION(:) :: A
COMPLEX(8), DIMENSION(:,:) :: B
INTEGER :: N, NRHS, LDB, INFO
INTEGER, DIMENSION(:) :: IPIVOT
SUBROUTINE HPTRS_64(UPLO, [N], [NRHS], A, IPIVOT, B, [LDB], [INFO])
CHARACTER(LEN=1) :: UPLO
COMPLEX(8), DIMENSION(:) :: A
COMPLEX(8), DIMENSION(:,:) :: B
INTEGER(8) :: N, NRHS, LDB, INFO
INTEGER(8), DIMENSION(:) :: IPIVOT
C INTERFACE
#include <sunperf.h>
void zhptrs(char uplo, int n, int nrhs, doublecomplex *a,
int *ipivot, doublecomplex *b, int ldb, int
*info);
void zhptrs_64(char uplo, long n, long nrhs, doublecomplex
*a, long *ipivot, doublecomplex *b, long ldb, long
*info);
zhptrs solves a system of linear equations A*X = B with a
complex Hermitian matrix A stored in packed format using the
factorization A = U*D*U**H or A = L*D*L**H computed by
ZHPTRF.
UPLO (input)
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**H;
= 'L': Lower triangular, form is A = L*D*L**H.
N (input) The order of the matrix A. N >= 0.
NRHS (input)
The number of right hand sides, i.e., the number
of columns of the matrix B. NRHS >= 0.
A (input) COMPLEX*16 array, dimension (N*(N+1)/2)
The block diagonal matrix D and the multipliers
used to obtain the factor U or L as computed by
ZHPTRF, stored as a packed triangular matrix.
IPIVOT (input) INTEGER array, dimension (N)
Details of the interchanges and the block struc-
ture of D as determined by ZHPTRF.
B (input/output) COMPLEX*16 array, dimension (LDB,NRHS)
On entry, the right hand side matrix B. On exit,
the solution matrix X.
LDB (input)
The leading dimension of the array B. LDB >=
max(1,N).
INFO (output)
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an ille-
gal value