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

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.ti -1c
.RI "real function \fBslanst\fP (norm, n, d, e)"
.br
.RI "\fBSLANST\fP returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a real symmetric tridiagonal matrix\&. "
.in -1c
.SH "Function/Subroutine Documentation"
.PP 
.SS "real function slanst (character norm, integer n, real, dimension( * ) d, real, dimension( * ) e)"

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

.PP
.nf
!>
!> SLANST  returns the value of the one norm,  or the Frobenius norm, or
!> the  infinity norm,  or the  element of  largest absolute value  of a
!> real symmetric tridiagonal matrix A\&.
!> 
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.RE
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\fBReturns\fP
.RS 4
SLANST 
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.nf
!>
!>    SLANST = ( 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\&.
!> 
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.PP
 
.RE
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\fBParameters\fP
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\fINORM\fP 
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!>          NORM is CHARACTER*1
!>          Specifies the value to be returned in SLANST as described
!>          above\&.
!> 
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\fIN\fP 
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!>          N is INTEGER
!>          The order of the matrix A\&.  N >= 0\&.  When N = 0, SLANST is
!>          set to zero\&.
!> 
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\fID\fP 
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!>          D is REAL array, dimension (N)
!>          The diagonal elements of A\&.
!> 
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\fIE\fP 
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!>          E is REAL array, dimension (N-1)
!>          The (n-1) sub-diagonal or super-diagonal elements of A\&.
!> 
.fi
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.RE
.PP
\fBAuthor\fP
.RS 4
Univ\&. of Tennessee 

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Univ\&. of California Berkeley 

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Univ\&. of Colorado Denver 

.PP
NAG Ltd\&. 
.RE
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Definition at line \fB99\fP of file \fBslanst\&.f\fP\&.
.SH "Author"
.PP 
Generated automatically by Doxygen for LAPACK from the source code\&.