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CentOS 7.0 - man page for sla_gerpvgrw (centos section 3)

sla_gerpvgrw.f(3)					LAPACK					    sla_gerpvgrw.f(3)

sla_gerpvgrw.f -
Functions/Subroutines REAL function sla_gerpvgrw (N, NCOLS, A, LDA, AF, LDAF) SLA_GERPVGRW Function/Subroutine Documentation REAL function sla_gerpvgrw (integerN, integerNCOLS, real, dimension( lda, * )A, integerLDA, real, dimension( ldaf, * )AF, integerLDAF) SLA_GERPVGRW Purpose: SLA_GERPVGRW computes the reciprocal pivot growth factor norm(A)/norm(U). The "max absolute element" norm is used. If this is much less than 1, the stability of the LU factorization of the (equilibrated) matrix A could be poor. This also means that the solution X, estimated condition numbers, and error bounds could be unreliable. Parameters: N N is INTEGER The number of linear equations, i.e., the order of the matrix A. N >= 0. NCOLS NCOLS is INTEGER The number of columns of the matrix A. NCOLS >= 0. A A is REAL 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 REAL array, dimension (LDAF,N) The factors L and U from the factorization A = P*L*U as computed by SGETRF. LDAF LDAF is INTEGER The leading dimension of the array AF. LDAF >= max(1,N). Author: Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. Date: November 2011 Definition at line 98 of file sla_gerpvgrw.f. Author Generated automatically by Doxygen for LAPACK from the source code. Version 3.4.2 Tue Sep 25 2012 sla_gerpvgrw.f(3)
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