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user 299973
Questions designed to get an overview of a specific subject or body of results or to understand the relations among similar definitions, techniques or concepts appearing in different sub-fields of mathematics. While such questions by their very nature sometimes cannot be made very narrow and focused, it can be helpful to keep in mind that the design of MathOverflow does not make it a good fit for questions that are too broad.
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Categorical Invariants
I think the existence of limits for different types of diagrams serve as categorical invariants. Higher category theory I think is the search of more fine grained invariants but I don't know if the pr …
