zhetri.f(3) [debian man page]

zhetri.f(3)							      LAPACK							       zhetri.f(3)

NAME

       zhetri.f -

SYNOPSIS

   Functions/Subroutines
       subroutine zhetri (UPLO, N, A, LDA, IPIV, WORK, INFO)
	   ZHETRI

Function/Subroutine Documentation
   subroutine zhetri (characterUPLO, integerN, complex*16, dimension( lda, * )A, integerLDA, integer, dimension( * )IPIV, complex*16, dimension( *
       )WORK, integerINFO)
       ZHETRI

       Purpose:

	    ZHETRI computes the inverse of a complex Hermitian indefinite matrix
	    A using the factorization A = U*D*U**H or A = L*D*L**H computed by
	    ZHETRF.

       Parameters:
	   UPLO

		     UPLO is CHARACTER*1
		     Specifies whether the details of the factorization are stored
		     as an upper or lower triangular matrix.
		     = 'U':  Upper triangular, form is A = U*D*U**H;
		     = 'L':  Lower triangular, form is A = L*D*L**H.

	   N

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

	   A

		     A is COMPLEX*16 array, dimension (LDA,N)
		     On entry, the block diagonal matrix D and the multipliers
		     used to obtain the factor U or L as computed by ZHETRF.

		     On exit, if INFO = 0, the (Hermitian) inverse of the original
		     matrix.  If UPLO = 'U', the upper triangular part of the
		     inverse is formed and the part of A below the diagonal is not
		     referenced; if UPLO = 'L' the lower triangular part of the
		     inverse is formed and the part of A above the diagonal is
		     not referenced.

	   LDA

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

	   IPIV

		     IPIV is INTEGER array, dimension (N)
		     Details of the interchanges and the block structure of D
		     as determined by ZHETRF.

	   WORK

		     WORK is COMPLEX*16 array, dimension (N)

	   INFO

		     INFO is INTEGER
		     = 0: successful exit
		     < 0: if INFO = -i, the i-th argument had an illegal value
		     > 0: if INFO = i, D(i,i) = 0; the matrix is singular and its
			  inverse could not be computed.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   November 2011

       Definition at line 115 of file zhetri.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.1							  Sun May 26 2013						       zhetri.f(3)

Check Out this Related Man Page

ZHETRI(l)								 )								 ZHETRI(l)

NAME

       ZHETRI  -  compute  the inverse of a complex Hermitian indefinite matrix A using the factorization A = U*D*U**H or A = L*D*L**H computed by
       ZHETRF

SYNOPSIS

       SUBROUTINE ZHETRI( UPLO, N, A, LDA, IPIV, WORK, INFO )

	   CHARACTER	  UPLO

	   INTEGER	  INFO, LDA, N

	   INTEGER	  IPIV( * )

	   COMPLEX*16	  A( LDA, * ), WORK( * )

PURPOSE

       ZHETRI computes the inverse of a complex Hermitian indefinite matrix A using the factorization A = U*D*U**H or A  =  L*D*L**H  computed	by
       ZHETRF.

ARGUMENTS

       UPLO    (input) CHARACTER*1
	       Specifies  whether  the	details of the factorization are stored as an upper or lower triangular matrix.  = 'U':  Upper triangular,
	       form is A = U*D*U**H;
	       = 'L':  Lower triangular, form is A = L*D*L**H.

       N       (input) INTEGER
	       The order of the matrix A.  N >= 0.

       A       (input/output) COMPLEX*16 array, dimension (LDA,N)
	       On entry, the block diagonal matrix D and the multipliers used to obtain the factor U or L as computed by ZHETRF.

	       On exit, if INFO = 0, the (Hermitian) inverse of the original matrix.  If UPLO = 'U', the upper triangular part of the  inverse	is
	       formed and the part of A below the diagonal is not referenced; if UPLO = 'L' the lower triangular part of the inverse is formed and
	       the part of A above the diagonal is not referenced.

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

       IPIV    (input) INTEGER array, dimension (N)
	       Details of the interchanges and the block structure of D as determined by ZHETRF.

       WORK    (workspace) COMPLEX*16 array, dimension (N)

       INFO    (output) INTEGER
	       = 0: successful exit
	       < 0: if INFO = -i, the i-th argument had an illegal value
	       > 0: if INFO = i, D(i,i) = 0; the matrix is singular and its inverse could not be computed.

LAPACK version 3.0						   15 June 2000 							 ZHETRI(l)

Linux and UNIX Man Pages

zhetri.f(3) [debian man page]

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