.TH "sla_porpvgrw.f" 3 "Wed Oct 15 2014" "Version 3.4.2" "LAPACK" \" -*- nroff -*-
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.SH NAME
sla_porpvgrw.f \- 
.SH SYNOPSIS
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.SS "Functions/Subroutines"

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.RI "real function \fBsla_porpvgrw\fP (UPLO, NCOLS, A, LDA, AF, LDAF, WORK)"
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.RI "\fI\fBSLA_PORPVGRW\fP computes the reciprocal pivot growth factor norm(A)/norm(U) for a symmetric or Hermitian positive-definite matrix\&. \fP"
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.SH "Function/Subroutine Documentation"
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.SS "real function sla_porpvgrw (character*1UPLO, integerNCOLS, real, dimension( lda, * )A, integerLDA, real, dimension( ldaf, * )AF, integerLDAF, real, dimension( * )WORK)"

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\fBSLA_PORPVGRW\fP computes the reciprocal pivot growth factor norm(A)/norm(U) for a symmetric or Hermitian positive-definite matrix\&.  
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\fBPurpose: \fP
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.nf
 SLA_PORPVGRW 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.
.fi
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.RE
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\fBParameters:\fP
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\fIUPLO\fP 
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          UPLO is CHARACTER*1
       = 'U':  Upper triangle of A is stored;
       = 'L':  Lower triangle of A is stored.
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\fINCOLS\fP 
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          NCOLS is INTEGER
     The number of columns of the matrix A. NCOLS >= 0.
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\fIA\fP 
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          A is REAL array, dimension (LDA,N)
     On entry, the N-by-N matrix A.
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\fILDA\fP 
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          LDA is INTEGER
     The leading dimension of the array A.  LDA >= max(1,N).
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\fIAF\fP 
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          AF is REAL array, dimension (LDAF,N)
     The triangular factor U or L from the Cholesky factorization
     A = U**T*U or A = L*L**T, as computed by SPOTRF.
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\fILDAF\fP 
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          LDAF is INTEGER
     The leading dimension of the array AF.  LDAF >= max(1,N).
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\fIWORK\fP 
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          WORK is REAL array, dimension (2*N)
.fi
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.RE
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\fBAuthor:\fP
.RS 4
Univ\&. of Tennessee 
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Univ\&. of California Berkeley 
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Univ\&. of Colorado Denver 
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NAG Ltd\&. 
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\fBDate:\fP
.RS 4
September 2012 
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Definition at line 105 of file sla_porpvgrw\&.f\&.
.SH "Author"
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Generated automatically by Doxygen for LAPACK from the source code\&.