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Theorem nat.sub_sub_assoc

Modification history

2021-10-06 10:12
src/data/nat/basic.lean
refactor(data/nat/basic): remove sub lemmas (#9544) …
Deleted nat.sub_sub_assocView on Github →
2019-11-19 20:49
src/data/nat/basic.lean
feat(algebra/group; data/nat) lemmas for sub sub assoc (#1712) …
Added nat.sub_sub_assocView on Github →