.TH "SRC/sla_porpvgrw.f" 3 "Version 3.12.0" "LAPACK" \" -*- nroff -*-
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.SH NAME
SRC/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 "\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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.SH "Function/Subroutine Documentation"
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.SS "real function sla_porpvgrw (character*1 uplo, integer ncols, real, dimension( lda, * ) a, integer lda, real, dimension( ldaf, * ) af, integer ldaf, 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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!>
!>
!> SLA_PORPVGRW computes the reciprocal pivot growth factor
!> norm(A)/norm(U)\&. The  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\&.
!> 
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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)
!> 
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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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Definition at line \fB103\fP of file \fBsla_porpvgrw\&.f\fP\&.
.SH "Author"
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Generated automatically by Doxygen for LAPACK from the source code\&.