SRC/zla_syrcond_c.f(3)

NAME
SRC/zla_syrcond_c.f

SYNOPSIS

  Functions/Subroutines
double precision function zla_syrcond_c (uplo, n, a, lda, af, ldaf, ipiv, c, capply, info, work, rwork)
ZLA_SYRCOND_C computes the infinity norm condition number of op(A)*inv(diag(c)) for symmetric indefinite matrices.

Function/Subroutine Documentation

  double precision function zla_syrcond_c (character uplo, integer n, complex*16, dimension( lda, * ) a, integer lda, complex*16, dimension( ldaf, * ) af, integer ldaf, integer, dimension( * ) ipiv, double precision, dimension( * ) c, logical capply, integer info, complex*16, dimension( * ) work, double precision, dimension( * ) rwork)

ZLA_SYRCOND_C computes the infinity norm condition number of op(A)*inv(diag(c)) for symmetric indefinite matrices.

Purpose:

    !>
    !>    ZLA_SYRCOND_C Computes the infinity norm condition number of
    !>    op(A) * inv(diag(C)) where C is a DOUBLE PRECISION 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*16 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*16 array, dimension (LDAF,N)
    !>     The block diagonal matrix D and the multipliers used to
    !>     obtain the factor U or L as computed by ZSYTRF.
    !>

    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 ZSYTRF.
    !>

    C

    !>          C is DOUBLE PRECISION array, dimension (N)
    !>     The vector C in the formula op(A) * inv(diag(C)).
    !>

    CAPPLY

    !>          CAPPLY is LOGICAL
    !>     If .TRUE. then access the vector C in the formula above.
    !>

    INFO

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

    WORK

    !>          WORK is COMPLEX*16 array, dimension (2*N).
    !>     Workspace.
    !>

    RWORK

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

Author
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Definition at line 137 of file zla_syrcond_c.f.

Author

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