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dtrtri.f(3)				      LAPACK				      dtrtri.f(3)

       dtrtri.f -

       subroutine dtrtri (UPLO, DIAG, N, A, LDA, INFO)

Function/Subroutine Documentation
   subroutine dtrtri (characterUPLO, characterDIAG, integerN, double precision, dimension( lda, *
       )A, integerLDA, integerINFO)


	    DTRTRI computes the inverse of a real upper or lower triangular
	    matrix A.

	    This is the Level 3 BLAS version of the algorithm.


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


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


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


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


		     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.

	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

	   November 2011

       Definition at line 110 of file dtrtri.f.

       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.2				 Tue Sep 25 2012			      dtrtri.f(3)
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