nifty8.operators.sum_operator module

class SumOperator(ops, neg, dom, tgt, _callingfrommake=False)

Bases: LinearOperator

Class representing sums of operators.

Notes

This operator has to be called using the make method.

__init__(ops, neg, dom, tgt, _callingfrommake=False)

__repr__()

Return repr(self).

property adjoint

the adjoint of self

Returns a LinearOperator object which behaves as if it were the adjoint of this operator.

Type:

LinearOperator

apply(x, mode)

Applies the Operator to a given x, in a specified mode.

Parameters:

• x (nifty8.field.Field) – The input Field, defined on the Operator’s domain or target, depending on mode.

• mode (int) –

  • TIMES: normal application

  • ADJOINT_TIMES: adjoint application

  • INVERSE_TIMES: inverse application

  • ADJOINT_INVERSE_TIMES or INVERSE_ADJOINT_TIMES: adjoint inverse application

Returns:

The processed Field defined on the Operator’s target or domain, depending on mode.

Return type:

nifty8.field.Field

draw_sample(from_inverse=False)

static make(ops, neg)

Build a SumOperator (or something simpler if possible)

Parameters:

• ops (list of LinearOperator) – Individual operators of the sum.

• neg (list of bool) – Same length as ops. If True then the corresponding operator gets a minus in the sum.

static simplify(ops, neg)