bookshelf

Author	SHA1	Message	Date
Joshua Potter	dd4340c4bd	Move `OrderedPair` and `Relation` to Enderton. These modules probably won't be very useful in general; there exist better representations in Lean when dealing with ordered pairs or relations already.	2023-06-29 15:25:59 -06:00
Joshua Potter	7559664d56	Enderton. Ordered pairs.	2023-06-08 17:57:02 -06:00
Joshua Potter	fd816a97bc	Enderton "Algebra of Sets" identities and create `Chapter_2.lean`.	2023-05-23 09:18:23 -06:00
Joshua Potter	ed981c3892	Add start of Enderton's "Elements of Set Theory."	2023-05-18 14:04:59 -06:00