ztrtri - compute the inverse of a complex upper or lower triangular matrix A
SUBROUTINE ZTRTRI(UPLO, DIAG, N, A, LDA, INFO) CHARACTER*1 UPLO, DIAG DOUBLE COMPLEX A(LDA,*) INTEGER N, LDA, INFO SUBROUTINE ZTRTRI_64(UPLO, DIAG, N, A, LDA, INFO) CHARACTER*1 UPLO, DIAG DOUBLE COMPLEX A(LDA,*) INTEGER*8 N, LDA, INFO F95 INTERFACE SUBROUTINE TRTRI(UPLO, DIAG, N, A, LDA, INFO) CHARACTER(LEN=1) :: UPLO, DIAG COMPLEX(8), DIMENSION(:,:) :: A INTEGER :: N, LDA, INFO SUBROUTINE TRTRI_64(UPLO, DIAG, N, A, LDA, INFO) CHARACTER(LEN=1) :: UPLO, DIAG COMPLEX(8), DIMENSION(:,:) :: A INTEGER(8) :: N, LDA, INFO C INTERFACE #include <sunperf.h> void ztrtri(char uplo, char diag, int n, doublecomplex *a, int lda, int *info); void ztrtri_64(char uplo, char diag, long n, doublecomplex *a, long lda, long *info);
Oracle Solaris Studio Performance Library ztrtri(3P) NAME ztrtri - compute the inverse of a complex upper or lower triangular matrix A SYNOPSIS SUBROUTINE ZTRTRI(UPLO, DIAG, N, A, LDA, INFO) CHARACTER*1 UPLO, DIAG DOUBLE COMPLEX A(LDA,*) INTEGER N, LDA, INFO SUBROUTINE ZTRTRI_64(UPLO, DIAG, N, A, LDA, INFO) CHARACTER*1 UPLO, DIAG DOUBLE COMPLEX A(LDA,*) INTEGER*8 N, LDA, INFO F95 INTERFACE SUBROUTINE TRTRI(UPLO, DIAG, N, A, LDA, INFO) CHARACTER(LEN=1) :: UPLO, DIAG COMPLEX(8), DIMENSION(:,:) :: A INTEGER :: N, LDA, INFO SUBROUTINE TRTRI_64(UPLO, DIAG, N, A, LDA, INFO) CHARACTER(LEN=1) :: UPLO, DIAG COMPLEX(8), DIMENSION(:,:) :: A INTEGER(8) :: N, LDA, INFO C INTERFACE #include <sunperf.h> void ztrtri(char uplo, char diag, int n, doublecomplex *a, int lda, int *info); void ztrtri_64(char uplo, char diag, long n, doublecomplex *a, long lda, long *info); PURPOSE ztrtri computes the inverse of a complex upper or lower triangular matrix A. This is the Level 3 BLAS version of the algorithm. ARGUMENTS UPLO (input) = 'U': A is upper triangular; = 'L': A is lower triangular. DIAG (input) = 'N': A is non-unit triangular; = 'U': A is unit triangular. N (input) The order of the matrix A. N >= 0. A (input/output) On entry, the triangular matrix A. If UPLO = 'U', the leading N-by-N upper triangular part of the array A contains the upper triangular matrix, and the strictly lower triangular part of A is not referenced. If UPLO = 'L', the leading N-by- N lower triangular part of the array A contains the lower triangular matrix, and the strictly upper triangular part of A is not referenced. If DIAG = 'U', the diagonal elements of A are also not referenced and are assumed to be 1. On exit, the (triangular) inverse of the original matrix, in the same storage format. LDA (input) The leading dimension of the array A. LDA >= max(1,N). INFO (output) = 0: successful exit; < 0: if INFO = -i, the i-th argument had an illegal value. > 0: if INFO = i, A(i,i) is exactly zero. The triangular matrix is singular and its inverse can not be computed. 7 Nov 2015 ztrtri(3P)