.TH "dgecon.f" 3 "Wed Oct 15 2014" "Version 3.4.2" "LAPACK" \" -*- nroff -*-
.ad l
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.SH NAME
dgecon.f \- 
.SH SYNOPSIS
.br
.PP
.SS "Functions/Subroutines"

.in +1c
.ti -1c
.RI "subroutine \fBdgecon\fP (NORM, N, A, LDA, ANORM, RCOND, WORK, IWORK, INFO)"
.br
.RI "\fI\fBDGECON\fP \fP"
.in -1c
.SH "Function/Subroutine Documentation"
.PP 
.SS "subroutine dgecon (characterNORM, integerN, double precision, dimension( lda, * )A, integerLDA, double precisionANORM, double precisionRCOND, double precision, dimension( * )WORK, integer, dimension( * )IWORK, integerINFO)"

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\fBDGECON\fP  
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\fBPurpose: \fP
.RS 4

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.nf
 DGECON estimates the reciprocal of the condition number of a general
 real matrix A, in either the 1-norm or the infinity-norm, using
 the LU factorization computed by DGETRF.

 An estimate is obtained for norm(inv(A)), and the reciprocal of the
 condition number is computed as
    RCOND = 1 / ( norm(A) * norm(inv(A)) ).
.fi
.PP
 
.RE
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\fBParameters:\fP
.RS 4
\fINORM\fP 
.PP
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          NORM is CHARACTER*1
          Specifies whether the 1-norm condition number or the
          infinity-norm condition number is required:
          = '1' or 'O':  1-norm;
          = 'I':         Infinity-norm.
.fi
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\fIN\fP 
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          N is INTEGER
          The order of the matrix A.  N >= 0.
.fi
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\fIA\fP 
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          A is DOUBLE PRECISION array, dimension (LDA,N)
          The factors L and U from the factorization A = P*L*U
          as computed by DGETRF.
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\fILDA\fP 
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          LDA is INTEGER
          The leading dimension of the array A.  LDA >= max(1,N).
.fi
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\fIANORM\fP 
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          ANORM is DOUBLE PRECISION
          If NORM = '1' or 'O', the 1-norm of the original matrix A.
          If NORM = 'I', the infinity-norm of the original matrix A.
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\fIRCOND\fP 
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          RCOND is DOUBLE PRECISION
          The reciprocal of the condition number of the matrix A,
          computed as RCOND = 1/(norm(A) * norm(inv(A))).
.fi
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\fIWORK\fP 
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          WORK is DOUBLE PRECISION array, dimension (4*N)
.fi
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\fIIWORK\fP 
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          IWORK is INTEGER array, dimension (N)
.fi
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\fIINFO\fP 
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          INFO is INTEGER
          = 0:  successful exit
          < 0:  if INFO = -i, the i-th argument had an illegal value
.fi
.PP
 
.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\&. 
.RE
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\fBDate:\fP
.RS 4
November 2011 
.RE
.PP

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Definition at line 124 of file dgecon\&.f\&.
.SH "Author"
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Generated automatically by Doxygen for LAPACK from the source code\&.