2 Commits (079710d40ae17ed3f0f2bc7fc1fc49b8be88318d)

Author	SHA1	Message	Date
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