SRC/cla_hercond_x.f(3)

NAME
SRC/cla_hercond_x.f

SYNOPSIS

  Functions/Subroutines
real function cla_hercond_x (uplo, n, a, lda, af, ldaf, ipiv, x, info, work, rwork)
CLA_HERCOND_X computes the infinity norm condition number of op(A)*diag(x) for Hermitian indefinite matrices.

Function/Subroutine Documentation

  real function cla_hercond_x (character uplo, integer n, complex, dimension( lda, * ) a, integer lda, complex, dimension( ldaf, * ) af, integer ldaf, integer, dimension( * ) ipiv, complex, dimension( * ) x, integer info, complex, dimension( * ) work, real, dimension( * ) rwork)

CLA_HERCOND_X computes the infinity norm condition number of op(A)*diag(x) for Hermitian indefinite matrices.

Purpose:

    !>
    !>    CLA_HERCOND_X computes the infinity norm condition number of
    !>    op(A) * diag(X) where X is a COMPLEX vector.
    !>

Parameters
    UPLO

    !>          UPLO is CHARACTER*1
    !>       = 'U':  Upper triangle of A is stored;
    !>       = 'L':  Lower triangle of A is stored.
    !>

    N

    !>          N is INTEGER
    !>     The number of linear equations, i.e., the order of the
    !>     matrix A.  N >= 0.
    !>

    A

    !>          A is COMPLEX array, dimension (LDA,N)
    !>     On entry, the N-by-N matrix A.
    !>

    LDA

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

    AF

    !>          AF is COMPLEX array, dimension (LDAF,N)
    !>     The block diagonal matrix D and the multipliers used to
    !>     obtain the factor U or L as computed by CHETRF.
    !>

    LDAF

    !>          LDAF is INTEGER
    !>     The leading dimension of the array AF.  LDAF >= max(1,N).
    !>

    IPIV

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

    X

    !>          X is COMPLEX array, dimension (N)
    !>     The vector X in the formula op(A) * diag(X).
    !>

    INFO

    !>          INFO is INTEGER
    !>       = 0:  Successful exit.
    !>     i > 0:  The ith argument is invalid.
    !>

    WORK

    !>          WORK is COMPLEX array, dimension (2*N).
    !>     Workspace.
    !>

    RWORK

    !>          RWORK is REAL array, dimension (N).
    !>     Workspace.
    !>

Author
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Definition at line 129 of file cla_hercond_x.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.