Joshua Potter 83699dd58e Enderton. Continue actually verifying set theorems.		2023-08-09 15:44:40 -06:00
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Basic.lean	Enderton. Continue actually verifying set theorems.	2023-08-09 15:44:40 -06:00
Peano.lean	Enderton. Peano systems.	2023-07-21 14:25:36 -06:00