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Commit 2022-06-16 12:52 b05d8459

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feat(data/nat/basic): add a few lemmas (#14718) Add a few lemmas about sub and mod.

Estimated changes

Modified src/algebra/order/sub.lean

added theorem tsub_lt_of_lt

Modified src/data/nat/basic.lean

added theorem nat.mul_add_mod

added theorem nat.mul_add_mod_of_lt

added theorem nat.pred_eq_self_iff