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

.in +1c
.ti -1c
.RI "real function \fBclangt\fP (norm, n, dl, d, du)"
.br
.RI "\fBCLANGT\fP returns the value of the 1-norm, Frobenius norm, infinity-norm, or the largest absolute value of any element of a general tridiagonal matrix\&. "
.in -1c
.SH "Function/Subroutine Documentation"
.PP 
.SS "real function clangt (character norm, integer n, complex, dimension( * ) dl, complex, dimension( * ) d, complex, dimension( * ) du)"

.PP
\fBCLANGT\fP returns the value of the 1-norm, Frobenius norm, infinity-norm, or the largest absolute value of any element of a general tridiagonal matrix\&.  
.PP
\fBPurpose:\fP
.RS 4

.PP
.nf
!>
!> CLANGT  returns the value of the one norm,  or the Frobenius norm, or
!> the  infinity norm,  or the  element of  largest absolute value  of a
!> complex tridiagonal matrix A\&.
!> 
.fi
.PP
.RE
.PP
\fBReturns\fP
.RS 4
CLANGT 
.PP
.nf
!>
!>    CLANGT = ( max(abs(A(i,j))), NORM = 'M' or 'm'
!>             (
!>             ( norm1(A),         NORM = '1', 'O' or 'o'
!>             (
!>             ( normI(A),         NORM = 'I' or 'i'
!>             (
!>             ( normF(A),         NORM = 'F', 'f', 'E' or 'e'
!>
!> where  norm1  denotes the  one norm of a matrix (maximum column sum),
!> normI  denotes the  infinity norm  of a matrix  (maximum row sum) and
!> normF  denotes the  Frobenius norm of a matrix (square root of sum of
!> squares)\&.  Note that  max(abs(A(i,j)))  is not a consistent matrix norm\&.
!> 
.fi
.PP
 
.RE
.PP
\fBParameters\fP
.RS 4
\fINORM\fP 
.PP
.nf
!>          NORM is CHARACTER*1
!>          Specifies the value to be returned in CLANGT as described
!>          above\&.
!> 
.fi
.PP
.br
\fIN\fP 
.PP
.nf
!>          N is INTEGER
!>          The order of the matrix A\&.  N >= 0\&.  When N = 0, CLANGT is
!>          set to zero\&.
!> 
.fi
.PP
.br
\fIDL\fP 
.PP
.nf
!>          DL is COMPLEX array, dimension (N-1)
!>          The (n-1) sub-diagonal elements of A\&.
!> 
.fi
.PP
.br
\fID\fP 
.PP
.nf
!>          D is COMPLEX array, dimension (N)
!>          The diagonal elements of A\&.
!> 
.fi
.PP
.br
\fIDU\fP 
.PP
.nf
!>          DU is COMPLEX array, dimension (N-1)
!>          The (n-1) super-diagonal elements of A\&.
!> 
.fi
.PP
 
.RE
.PP
\fBAuthor\fP
.RS 4
Univ\&. of Tennessee 

.PP
Univ\&. of California Berkeley 

.PP
Univ\&. of Colorado Denver 

.PP
NAG Ltd\&. 
.RE
.PP

.PP
Definition at line \fB105\fP of file \fBclangt\&.f\fP\&.
.SH "Author"
.PP 
Generated automatically by Doxygen for LAPACK from the source code\&.