ZeroOperator

class odl.operator.default_ops.ZeroOperator(*args, **kwargs)

Bases: odl.operator.operator.Operator

Operator mapping each element to the zero element.

Implements:

ZeroOperator(space)(x) == space.zero()

Attributes

adjoint

Adjoint of the operator.

domain

Set of objects on which this operator can be evaluated.

inverse

Return the operator inverse.

is_functional

True if this operator’s range is a Field.

is_linear

True if this operator is linear.

range

Set in which the result of an evaluation of this operator lies.

Methods

_call(self, x[, out])	Return the zero vector or assign it to out.
derivative(self, point)	Return the operator derivative at point.
norm(self[, estimate])	Return the operator norm of this operator.

__init__(self, domain, range=None)

Initialize a new instance.

Parameters

domainLinearSpace

Domain of the operator.

rangeLinearSpace, optional

Range of the operator. Default: domain

Examples

>>> op = odl.ZeroOperator(odl.rn(3))
>>> op([1, 2, 3])
rn(3).element([ 0.,  0.,  0.])

Also works with domain != range:

>>> op = odl.ZeroOperator(odl.rn(3), odl.cn(4))
>>> op([1, 2, 3])
cn(4).element([ 0.+0.j,  0.+0.j,  0.+0.j,  0.+0.j])