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Theorem or_congr_left

Modification history

2022-02-16 19:16
src/logic/basic.lean
feat(logic/basic): Better congruence lemmas for `or`, `or_or_or_comm` (#12004) …
Modified or_congr_leftView on Github →
2022-02-04 06:54
src/logic/basic.lean
feat(logic/basic): add projection notation for iff (#11803)
Modified or_congr_leftView on Github →
2021-01-27 18:19
src/logic/basic.lean
refactor(data/set/basic): simpler proofs (#5920) …
Added or_congr_leftView on Github →