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GRBSOS
Gurobi SOS constraint object. SOS constraints are always associated
with a particular model. You create an SOS object by adding an SOS
constraint to a model (using
GRBModel.addSOS), rather
than by using a GRBSOS constructor. Similarly, SOS
constraints are removed using the
GRBModel.remove method.
An SOS constraint can be of type 1 or 2 (GRB.SOS_TYPE1 or
GRB.SOS_TYPE2). A type 1 SOS constraint is a set of
variables where at most one variable in the set may take a value
other than zero. A type 2 SOS constraint is an ordered set of
variables where at most two variables in the set may take non-zero
values. If two take non-zero values, they must be contiguous in the
ordered set.
SOS constraint objects have one attribute, IISSOS, which can
be queried with the
GRBSOS.get method.
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