dtrti2 man page on YellowDog

Man page or keyword search:  
man Server   18644 pages
apropos Keyword Search (all sections)
Output format
YellowDog logo
[printable version]

DTRTI2(l)			       )			     DTRTI2(l)

NAME
       DTRTI2 - compute the inverse of a real upper or lower triangular matrix

SYNOPSIS
       SUBROUTINE DTRTI2( UPLO, DIAG, N, A, LDA, INFO )

	   CHARACTER	  DIAG, UPLO

	   INTEGER	  INFO, LDA, N

	   DOUBLE	  PRECISION A( LDA, * )

PURPOSE
       DTRTI2 computes the inverse of a real upper or lower triangular matrix.
       This is the Level 2 BLAS version of the algorithm.

ARGUMENTS
       UPLO    (input) CHARACTER*1
	       Specifies whether the matrix A is upper or lower triangular.  =
	       'U':  Upper triangular
	       = 'L':  Lower triangular

       DIAG    (input) CHARACTER*1
	       Specifies  whether  or  not the matrix A is unit triangular.  =
	       'N':  Non-unit triangular
	       = 'U':  Unit triangular

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

       A       (input/output) 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 ref‐
	       erenced.	 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) INTEGER
	       The leading dimension of the array A.  LDA >= max(1,N).

       INFO    (output) INTEGER
	       = 0: successful exit
	       < 0: if INFO = -k, the k-th argument had an illegal value

LAPACK version 3.0		 15 June 2000			     DTRTI2(l)
[top]

List of man pages available for YellowDog

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net