Commit 2022-07-19 18:28 5e114a3e

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feat(set_theory/ordinal/arithmetic): more log lemmas (#15447) We prove a bunch of lemmas on the ordinal logarithm that are relevant for Cantor normal forms.

Estimated changes

Modified src/set_theory/ordinal/arithmetic.lean

added theorem ordinal.div_opow_log_lt

added theorem ordinal.div_pos

added theorem ordinal.log_eq_zero

added theorem ordinal.log_mod_opow_log_lt_log_self

modified theorem ordinal.log_opow

added theorem ordinal.log_pos

modified theorem ordinal.lt_div