sb_norm_i(3PI) Sun Interval Performance Library sb_norm_i(3PI)NAMEsb_norm_i - Symmetric band interval matrix norms.
DESCRIPTION
R = SB_NORM_I ( A, NORM )
The routine SB_NORM_I computes ONE_NORM, FROBENIUS_NORM, INFINITY_NORM
or MAX_NORM of a symmetric band interval matrix A depending on the
value passed as the NORM operator argument. The resulting scalar R is
always interval. If N is equal to zero or K is less than zero, this
routine returns immediately with the output scalar R set to zero
interval.
SYNOPSIS
INTERVAL FUNCTION SB_NORM_I( A [, NORM] [, UPLO] )
INTERVAL, INTENT(IN) :: A(:,:)
TYPE(blas_norm_type), INTENT(IN), OPTIONAL :: NORM
TYPE(blas_uplo_type), INTENT(IN), OPTIONAL :: UPLO
where
A has shape (K+1,N), K = band width.
ARGUMENTS
A (input)
Array of DIMENSION (K+1,N), K = band width.
Unchanged on exit.
NORM(input)
Scalar element. On entry, should be equal to
blas_norm_type value, i.e. NORM should take one
of the following values:
blas_one_norm | blas_frobenius_norm |
blas_inf_norm | blas_max_norm
Default value: blas_one_norm
Unchanged on exit.
UPLO(input)
Scalar element.
Specifies if the matrix operand is an upper or
lower tringular part of the symmetric matrix.
Possible values:
UPLO = blas_upper (default)
UPLO = blas_lower
Unchanged on exit.
ERRORS
blas_error_alloc
A is unallocated array
blas_error_shape
A has unappropriate shape
blas_error_norm
Unappropriate NORM argument
6 Mar 2009 sb_norm_i(3PI)
