
NAMEzla_hercond_x.f SYNOPSISFunctions/SubroutinesDOUBLE PRECISION function zla_hercond_x (UPLO, N, A, LDA, AF, LDAF, IPIV, X, INFO, WORK, RWORK) Function/Subroutine DocumentationDOUBLE PRECISION function zla_hercond_x (characterUPLO, integerN, complex*16, dimension( lda, * )A, integerLDA, complex*16, dimension( ldaf, * )AF, integerLDAF, integer, dimension( * )IPIV, complex*16, dimension( * )X, integerINFO, complex*16, dimension( * )WORK, double precision, dimension( * )RWORK)ZLA_HERCOND_X computes the infinity norm condition number of op(A)*diag(x) for Hermitian indefinite matrices. Purpose:ZLA_HERCOND_X computes the infinity norm condition number of op(A) * diag(X) where X is a COMPLEX*16 vector. UPLO
Author:
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 NbyN 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 ZHETRF.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*16 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*16 array, dimension (2*N). Workspace.RWORK RWORK is DOUBLE PRECISION array, dimension (N). Workspace. Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
September 2012
Definition at line 132 of file zla_hercond_x.f.
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