ztptrs - solve a triangular system of the form A * X = B, A**T * X = B, or A**H * X = B,
SUBROUTINE ZTPTRS( UPLO, TRANSA, DIAG, N, NRHS, A, B, LDB, INFO) CHARACTER * 1 UPLO, TRANSA, DIAG DOUBLE COMPLEX A(*), B(LDB,*) INTEGER N, NRHS, LDB, INFO
SUBROUTINE ZTPTRS_64( UPLO, TRANSA, DIAG, N, NRHS, A, B, LDB, INFO) CHARACTER * 1 UPLO, TRANSA, DIAG DOUBLE COMPLEX A(*), B(LDB,*) INTEGER*8 N, NRHS, LDB, INFO
SUBROUTINE TPTRS( UPLO, TRANSA, DIAG, N, [NRHS], A, B, [LDB], [INFO]) CHARACTER(LEN=1) :: UPLO, TRANSA, DIAG COMPLEX(8), DIMENSION(:) :: A COMPLEX(8), DIMENSION(:,:) :: B INTEGER :: N, NRHS, LDB, INFO
SUBROUTINE TPTRS_64( UPLO, TRANSA, DIAG, N, [NRHS], A, B, [LDB], * [INFO]) CHARACTER(LEN=1) :: UPLO, TRANSA, DIAG COMPLEX(8), DIMENSION(:) :: A COMPLEX(8), DIMENSION(:,:) :: B INTEGER(8) :: N, NRHS, LDB, INFO
#include <sunperf.h>
void ztptrs(char uplo, char transa, char diag, int n, int nrhs, doublecomplex *a, doublecomplex *b, int ldb, int *info);
void ztptrs_64(char uplo, char transa, char diag, long n, long nrhs, doublecomplex *a, doublecomplex *b, long ldb, long *info);
ztptrs solves a triangular system of the form
where A is a triangular matrix of order N stored in packed format, and B is an N-by-NRHS matrix. A check is made to verify that A is nonsingular.
= 'U': A is upper triangular;
= 'L': A is lower triangular.
= 'N': A * X = B (No transpose)
= 'T': A**T * X = B (Transpose)
= 'C': A**H * X = B (Conjugate transpose)
= 'N': A is non-unit triangular;
= 'U': A is unit triangular.
A(i,j)
for 1 < =i < =j;
if UPLO = 'L', A(i + (j-1)*(2*n-j)/2) = A(i,j)
for j < =i < =n.
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value
> 0: if INFO = i, the i-th diagonal element of A is zero, indicating that the matrix is singular and the solutions X have not been computed.