lean2/library/data/set/set.md

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data.set
========
Subsets of an arbitrary type.
* [basic](basic.lean) : unions, intersections, etc.
* [comm_semiring](comm_semiring.lean)
* [function](function.lean) : functions from one set to another
* [map](map.lean) : set functions bundled with their domain and codomain
* [finite](finite.lean) : the "finite" predicate on sets
* [card](card.lean) : cardinality (for finite sets)
* [classical_inverse](classical_inverse.lean) : inverse functions, defined classically