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Commit 2021-10-08 07:33 83a07ce0

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feat(data/nat/log): add antitonicity lemmas for first argument (#9597) log and clog are only antitone on bases >1, so we include this as an assumption in log_le_log_of_left_ge (resp. clog_le_...) and as a domain restriction in log_left_gt_one_anti (resp. clog_left_...).

Estimated changes

added theorem nat.clog_antitone_left
deleted theorem nat.clog_mono
added theorem nat.clog_monotone
added theorem nat.log_antitone_left
deleted theorem nat.log_mono
added theorem nat.log_monotone