ctrti2 (3p)

Name

ctrti2 - compute the inverse of a complex upper or lower triangular matrix

Synopsis

SUBROUTINE CTRTI2(UPLO, DIAG, N, A, LDA, INFO)

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

SUBROUTINE CTRTI2_64(UPLO, DIAG, N, A, LDA, INFO)

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




F95 INTERFACE
SUBROUTINE TRTI2(UPLO, DIAG, N, A, LDA, INFO)

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

SUBROUTINE TRTI2_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 ctrti2(char uplo, char diag, int  n,  complex  *a,  int  lda,  int
*info);

void ctrti2_64(char uplo, char diag, long n, complex *a, long lda, long
*info);

Description

Oracle Solaris Studio Performance Library                           ctrti2(3P)



NAME
       ctrti2  -  compute  the  inverse of a complex upper or lower triangular
       matrix


SYNOPSIS
       SUBROUTINE CTRTI2(UPLO, DIAG, N, A, LDA, INFO)

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

       SUBROUTINE CTRTI2_64(UPLO, DIAG, N, A, LDA, INFO)

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




   F95 INTERFACE
       SUBROUTINE TRTI2(UPLO, DIAG, N, A, LDA, INFO)

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

       SUBROUTINE TRTI2_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 ctrti2(char uplo, char diag, int  n,  complex  *a,  int  lda,  int
                 *info);

       void ctrti2_64(char uplo, char diag, long n, complex *a, long lda, long
                 *info);



PURPOSE
       ctrti2 computes the inverse of a  complex  upper  or  lower  triangular
       matrix.

       This is the Level 2 BLAS version of the algorithm.


ARGUMENTS
       UPLO (input)
                 Specifies  whether the matrix A is upper or lower triangular.
                 = 'U':  Upper triangular
                 = 'L':  Lower triangular


       DIAG (input)
                 Specifies whether or not the matrix A is unit triangular.   =
                 'N':  Non-unit triangular
                 = 'U':  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 = -k, the k-th argument had an illegal value




                                  7 Nov 2015                        ctrti2(3P)