ctrtri.f

Section: LAPACK (3)
Updated: Tue Nov 14 2017
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NAME

ctrtri.f  

SYNOPSIS


 

Functions/Subroutines


subroutine ctrtri (UPLO, DIAG, N, A, LDA, INFO)
CTRTRI  

Function/Subroutine Documentation

 

subroutine ctrtri (character UPLO, character DIAG, integer N, complex, dimension( lda, * ) A, integer LDA, integer INFO)

CTRTRI

Purpose:

 CTRTRI computes the inverse of a complex upper or lower triangular
 matrix A.

 This is the Level 3 BLAS version of the algorithm.


 

Parameters:

UPLO

          UPLO is CHARACTER*1
          = 'U':  A is upper triangular;
          = 'L':  A is lower triangular.


DIAG

          DIAG is CHARACTER*1
          = 'N':  A is non-unit triangular;
          = 'U':  A is unit triangular.


N

          N is INTEGER
          The order of the matrix A.  N >= 0.


A

          A is COMPLEX array, dimension (LDA,N)
          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

          LDA is INTEGER
          The leading dimension of the array A.  LDA >= max(1,N).


INFO

          INFO is INTEGER
          = 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.


 

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

December 2016

Definition at line 111 of file ctrtri.f.  

Author

Generated automatically by Doxygen for LAPACK from the source code.


 

Index

NAME
SYNOPSIS
Functions/Subroutines
Function/Subroutine Documentation
subroutine ctrtri (character UPLO, character DIAG, integer N, complex, dimension( lda, * ) A, integer LDA, integer INFO)
Author
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