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);

Description

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)