ZeroSumPropagator

(class from pyomo.contrib.preprocessing.plugins.zero_sum_propagator)

class pyomo.contrib.preprocessing.plugins.zero_sum_propagator.ZeroSumPropagator(**kwds)[source]

Bases: IsomorphicTransformation

Propagates fixed-to-zero for sums of only positive (or negative) vars.

If \(z\) is fixed to zero and \(z = x_1 + x_2 + x_3\) and \(x_1\), \(x_2\), \(x_3\) are all non-negative or all non-positive, then \(x_1\), \(x_2\), and \(x_3\) will be fixed to zero.

__init__(**kwds)

Methods

`__init__`(**kwds)
`apply`(model, **kwds)	DEPRECATED.
`apply_to`(model, **kwds)	Apply the transformation to the given model.
`create_using`(model, **kwds)	Create a new model with this transformation

Member Documentation

apply(model, **kwds): DEPRECATED.

Deprecated since version 4.3.11323: Transformation.apply() has been deprecated. Please use either Transformation.apply_to() for in-place transformations or Transformation.create_using() for transformations that create a new, independent transformed model instance.

apply_to(model, **kwds): Apply the transformation to the given model.

create_using(model, **kwds): Create a new model with this transformation