Provided by: liblapack-doc_3.3.1-1_all bug

NAME

       LAPACK-3 - computes the inverse of a real upper or lower triangular matrix

SYNOPSIS

       SUBROUTINE STRTI2( UPLO, DIAG, N, A, LDA, INFO )

           CHARACTER      DIAG, UPLO

           INTEGER        INFO, LDA, N

           REAL           A( LDA, * )

PURPOSE

       STRTI2 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) REAL 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     (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 routine (version 3.2)               April 2011                            STRTI2(3lapack)