Hello all, I was reading the Sympy documentation on Sets <https://docs.sympy.org/latest/modules/sets.html> which is under the Logic section of the documentation, but a LOT the properties discussed like boundaries and closures are only definable when there is a topology defined. It's clear a lot of work in Sympy has been done on sets over numbers so of course there is an inherited topology, but I wonder if there is either a way to extend the Set module to allow for custom topologies, or perhaps the documentation should be changed to at least be more explicit that the Set module is focused very heavily on sets of numbers with their usual topologies. I also just wanted to open up the conversation if anyone else has thoughts on this, I searched for "topology" in the mailing list archive and found surprisingly little. Best, Robert
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