table of contents
/home/abuild/rpmbuild/BUILD/lapack-3.12.0/SRC/zlanht.f(3) | Library Functions Manual | /home/abuild/rpmbuild/BUILD/lapack-3.12.0/SRC/zlanht.f(3) |
NAME¶
/home/abuild/rpmbuild/BUILD/lapack-3.12.0/SRC/zlanht.f
SYNOPSIS¶
Functions/Subroutines¶
double precision function ZLANHT (norm, n, d, e)
ZLANHT returns the value of the 1-norm, or the Frobenius norm, or the
infinity norm, or the element of largest absolute value of a complex
Hermitian tridiagonal matrix.
Function/Subroutine Documentation¶
double precision function ZLANHT (character norm, integer n, double precision, dimension( * ) d, complex*16, dimension( * ) e)¶
ZLANHT returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a complex Hermitian tridiagonal matrix.
Purpose:
!> !> ZLANHT 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
ZLANHT
!> !> ZLANHT = ( 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 ZLANHT as described !> above. !>
N
!> N is INTEGER !> The order of the matrix A. N >= 0. When N = 0, ZLANHT is !> set to zero. !>
D
!> D is DOUBLE PRECISION array, dimension (N) !> The diagonal elements of A. !>
E
!> E is COMPLEX*16 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.
Definition at line 100 of file zlanht.f.
Author¶
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Version 3.12.0 | LAPACK |