ctrtri (3p)

Name

ctrtri - compute the inverse of a complex upper or lower triangular matrix A

Synopsis

SUBROUTINE CTRTRI(UPLO, DIAG, N, A, LDA, INFO)

CHARACTER*1 UPLO, DIAG
COMPLEX A(LDA,*)
INTEGER N, LDA, INFO

SUBROUTINE CTRTRI_64(UPLO, DIAG, N, A, LDA, INFO)

CHARACTER*1 UPLO, DIAG
COMPLEX A(LDA,*)
INTEGER*8 N, LDA, INFO




F95 INTERFACE
SUBROUTINE TRTRI(UPLO, DIAG, N, A, LDA, INFO)

CHARACTER(LEN=1) :: UPLO, DIAG
COMPLEX, DIMENSION(:,:) :: A
INTEGER :: N, LDA, INFO

SUBROUTINE TRTRI_64(UPLO, DIAG, N, A, LDA, INFO)

CHARACTER(LEN=1) :: UPLO, DIAG
COMPLEX, DIMENSION(:,:) :: A
INTEGER(8) :: N, LDA, INFO




C INTERFACE
#include <sunperf.h>

void ctrtri(char uplo, char diag, int  n,  complex  *a,  int  lda,  int
*info);

void ctrtri_64(char uplo, char diag, long n, complex *a, long lda, long
*info);

Description

Oracle Solaris Studio Performance Library                           ctrtri(3P)



NAME
       ctrtri  -  compute  the  inverse of a complex upper or lower triangular
       matrix A


SYNOPSIS
       SUBROUTINE CTRTRI(UPLO, DIAG, N, A, LDA, INFO)

       CHARACTER*1 UPLO, DIAG
       COMPLEX A(LDA,*)
       INTEGER N, LDA, INFO

       SUBROUTINE CTRTRI_64(UPLO, DIAG, N, A, LDA, INFO)

       CHARACTER*1 UPLO, DIAG
       COMPLEX A(LDA,*)
       INTEGER*8 N, LDA, INFO




   F95 INTERFACE
       SUBROUTINE TRTRI(UPLO, DIAG, N, A, LDA, INFO)

       CHARACTER(LEN=1) :: UPLO, DIAG
       COMPLEX, DIMENSION(:,:) :: A
       INTEGER :: N, LDA, INFO

       SUBROUTINE TRTRI_64(UPLO, DIAG, N, A, LDA, INFO)

       CHARACTER(LEN=1) :: UPLO, DIAG
       COMPLEX, DIMENSION(:,:) :: A
       INTEGER(8) :: N, LDA, INFO




   C INTERFACE
       #include <sunperf.h>

       void ctrtri(char uplo, char diag, int  n,  complex  *a,  int  lda,  int
                 *info);

       void ctrtri_64(char uplo, char diag, long n, complex *a, long lda, long
                 *info);



PURPOSE
       ctrtri 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 lead-
                 ing 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                        ctrtri(3P)