.TH "SRC/clacon.f" 3 "Version 3.12.0" "LAPACK" \" -*- nroff -*-
.ad l
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.SH NAME
SRC/clacon.f
.SH SYNOPSIS
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.SS "Functions/Subroutines"

.in +1c
.ti -1c
.RI "subroutine \fBclacon\fP (n, v, x, est, kase)"
.br
.RI "\fBCLACON\fP estimates the 1-norm of a square matrix, using reverse communication for evaluating matrix-vector products\&. "
.in -1c
.SH "Function/Subroutine Documentation"
.PP 
.SS "subroutine clacon (integer n, complex, dimension( n ) v, complex, dimension( n ) x, real est, integer kase)"

.PP
\fBCLACON\fP estimates the 1-norm of a square matrix, using reverse communication for evaluating matrix-vector products\&.  
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\fBPurpose:\fP
.RS 4

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.nf
 CLACON estimates the 1-norm of a square, complex matrix A\&.
 Reverse communication is used for evaluating matrix-vector products\&.
.fi
.PP
 
.RE
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\fBParameters\fP
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\fIN\fP 
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          N is INTEGER
         The order of the matrix\&.  N >= 1\&.
.fi
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.br
\fIV\fP 
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          V is COMPLEX array, dimension (N)
         On the final return, V = A*W,  where  EST = norm(V)/norm(W)
         (W is not returned)\&.
.fi
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.br
\fIX\fP 
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.nf
          X is COMPLEX array, dimension (N)
         On an intermediate return, X should be overwritten by
               A * X,   if KASE=1,
               A**H * X,  if KASE=2,
         where A**H is the conjugate transpose of A, and CLACON must be
         re-called with all the other parameters unchanged\&.
.fi
.PP
.br
\fIEST\fP 
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.nf
          EST is REAL
         On entry with KASE = 1 or 2 and JUMP = 3, EST should be
         unchanged from the previous call to CLACON\&.
         On exit, EST is an estimate (a lower bound) for norm(A)\&.
.fi
.PP
.br
\fIKASE\fP 
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.nf
          KASE is INTEGER
         On the initial call to CLACON, KASE should be 0\&.
         On an intermediate return, KASE will be 1 or 2, indicating
         whether X should be overwritten by A * X  or A**H * X\&.
         On the final return from CLACON, KASE will again be 0\&.
.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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\fBFurther Details:\fP
.RS 4
Originally named CONEST, dated March 16, 1988\&. 
.br
 Last modified: April, 1999 
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\fBContributors:\fP
.RS 4
Nick Higham, University of Manchester 
.RE
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\fBReferences:\fP
.RS 4
N\&.J\&. Higham, 'FORTRAN codes for estimating the one-norm of
  a real or complex matrix, with applications to condition estimation', ACM Trans\&. Math\&. Soft\&., vol\&. 14, no\&. 4, pp\&. 381-396, December 1988\&. 
.RE
.PP

.PP
Definition at line \fB113\fP of file \fBclacon\&.f\fP\&.
.SH "Author"
.PP 
Generated automatically by Doxygen for LAPACK from the source code\&.