Status: Accepted
Owner: ----
Labels: Type-Defect Priority-Medium Sets
New issue 3159 by mrock...@gmail.com: Intersection class for sets
http://code.google.com/p/sympy/issues/detail?id=3159
There are a number of classes of sets including Intervals, FiniteSets,
Unions, EmptySet, and their cartesian products.
The Set.intersect method is very important for many set operations. It
effectively serves as the basic operation. Most set magic works because we
have good solutions for intersect
Currently each class contains logic on how to interact with as many other
classes as possible. This results in very complex code that is challenging
to extend. When you want to extend the system by adding a new class you
need to go in and change many of the other classes.
A good solution to these problems would be a central Intersection class
where these rules can be collected together. This is the current solution
with Union. Intersection would also serve as the result if no known
solution exists to intersect two particular sets.
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