slanst.f(3) LAPACK slanst.f(3)NAME
slanst.f -
SYNOPSIS
Functions/Subroutines
REAL function slanst (NORM, N, D, E)
SLANST
Function/Subroutine Documentation
REAL function slanst (characterNORM, integerN, real, dimension( * )D, real, dimension( * )E)
SLANST
Purpose:
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.
Returns:
SLANST
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.
Parameters:
NORM
NORM is CHARACTER*1
Specifies the value to be returned in SLANST as described
above.
N
N is INTEGER
The order of the matrix A. N >= 0. When N = 0, SLANST is
set to zero.
D
D is REAL array, dimension (N)
The diagonal elements of A.
E
E is REAL array, dimension (N-1)
The (n-1) sub-diagonal or super-diagonal elements of A.
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
November 2011
Definition at line 101 of file slanst.f.
Author
Generated automatically by Doxygen for LAPACK from the source code.
Version 3.4.1 Sun May 26 2013 slanst.f(3)
Check Out this Related Man Page
clanht.f(3) LAPACK clanht.f(3)NAME
clanht.f -
SYNOPSIS
Functions/Subroutines
REAL function clanht (NORM, N, D, E)
CLANHT
Function/Subroutine Documentation
REAL function clanht (characterNORM, integerN, real, dimension( * )D, complex, dimension( * )E)
CLANHT
Purpose:
CLANHT 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 Hermitian tridiagonal matrix A.
Returns:
CLANHT
CLANHT = ( 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.
Parameters:
NORM
NORM is CHARACTER*1
Specifies the value to be returned in CLANHT as described
above.
N
N is INTEGER
The order of the matrix A. N >= 0. When N = 0, CLANHT is
set to zero.
D
D is REAL array, dimension (N)
The diagonal elements of A.
E
E is COMPLEX array, dimension (N-1)
The (n-1) sub-diagonal or super-diagonal elements of A.
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
November 2011
Definition at line 102 of file clanht.f.
Author
Generated automatically by Doxygen for LAPACK from the source code.
Version 3.4.1 Sun May 26 2013 clanht.f(3)
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