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chore: Rename pow monotonicity lemmas (#9095)
The names for lemmas about monotonicity of `(a ^ ·)` and `(· ^ n)` were a mess. This PR tidies up everything related by following the naming convention for `(a * ·)` and `(· * b)`. Namely, `(a ^ ·)` is `pow_right` and `(· ^ n)` is `pow_left` in lemma names. All lemma renames follow the corresponding multiplication lemma names closely. ## Renames ### `Algebra.GroupPower.Order` * `pow_mono` → `pow_right_mono` * `pow_le_pow` → `pow_le_pow_right` * `pow_le_pow_of_le_left` → `pow_le_pow_left` * `pow_lt_pow_of_lt_left` → `pow_lt_pow_left` * `strictMonoOn_pow` → `pow_left_strictMonoOn` * `pow_strictMono_right` → `pow_right_strictMono` * `pow_lt_pow` → `pow_lt_pow_right` * `pow_lt_pow_iff` → `pow_lt_pow_iff_right` * `pow_le_pow_iff` → `pow_le_pow_iff_right` * `self_lt_pow` → `lt_self_pow` * `strictAnti_pow` → `pow_right_strictAnti` * `pow_lt_pow_iff_of_lt_one` → `pow_lt_pow_iff_right_of_lt_one` * `pow_lt_pow_of_lt_one` → `pow_lt_pow_right_of_lt_one` * `lt_of_pow_lt_pow` → `lt_of_pow_lt_pow_left` * `le_of_pow_le_pow` → `le_of_pow_le_pow_left` * `pow_lt_pow₀` → `pow_lt_pow_right₀` ### `Algebra.GroupPower.CovariantClass` * `pow_le_pow_of_le_left'` → `pow_le_pow_left'` * `nsmul_le_nsmul_of_le_right` → `nsmul_le_nsmul_right` * `pow_lt_pow'` → `pow_lt_pow_right'` * `nsmul_lt_nsmul` → `nsmul_lt_nsmul_left` * `pow_strictMono_left` → `pow_right_strictMono'` * `nsmul_strictMono_right` → `nsmul_left_strictMono` * `StrictMono.pow_right'` → `StrictMono.pow_const` * `StrictMono.nsmul_left` → `StrictMono.const_nsmul` * `pow_strictMono_right'` → `pow_left_strictMono` * `nsmul_strictMono_left` → `nsmul_right_strictMono` * `Monotone.pow_right` → `Monotone.pow_const` * `Monotone.nsmul_left` → `Monotone.const_nsmul` * `lt_of_pow_lt_pow'` → `lt_of_pow_lt_pow_left'` * `lt_of_nsmul_lt_nsmul` → `lt_of_nsmul_lt_nsmul_right` * `pow_le_pow'` → `pow_le_pow_right'` * `nsmul_le_nsmul` → `nsmul_le_nsmul_left` * `pow_le_pow_of_le_one'` → `pow_le_pow_right_of_le_one'` * `nsmul_le_nsmul_of_nonpos` → `nsmul_le_nsmul_left_of_nonpos` * `le_of_pow_le_pow'` → `le_of_pow_le_pow_left'` * `le_of_nsmul_le_nsmul'` → `le_of_nsmul_le_nsmul_right'` * `pow_le_pow_iff'` → `pow_le_pow_iff_right'` * `nsmul_le_nsmul_iff` → `nsmul_le_nsmul_iff_left` * `pow_lt_pow_iff'` → `pow_lt_pow_iff_right'` * `nsmul_lt_nsmul_iff` → `nsmul_lt_nsmul_iff_left` ### `Data.Nat.Pow` * `Nat.pow_lt_pow_of_lt_left` → `Nat.pow_lt_pow_left` * `Nat.pow_le_iff_le_left` → `Nat.pow_le_pow_iff_left` * `Nat.pow_lt_iff_lt_left` → `Nat.pow_lt_pow_iff_left` ## Lemmas added * `pow_le_pow_iff_left` * `pow_lt_pow_iff_left` * `pow_right_injective` * `pow_right_inj` * `Nat.pow_le_pow_left` to have the correct name since `Nat.pow_le_pow_of_le_left` is in Std. * `Nat.pow_le_pow_right` to have the correct name since `Nat.pow_le_pow_of_le_right` is in Std. ## Lemmas removed * `self_le_pow` was a duplicate of `le_self_pow`. * `Nat.pow_lt_pow_of_lt_right` is defeq to `pow_lt_pow_right`. * `Nat.pow_right_strictMono` is defeq to `pow_right_strictMono`. * `Nat.pow_le_iff_le_right` is defeq to `pow_le_pow_iff_right`. * `Nat.pow_lt_iff_lt_right` is defeq to `pow_lt_pow_iff_right`. ## Other changes * A bunch of proofs have been golfed. * Some lemma assumptions have been turned from `0 < n` or `1 ≤ n` to `n ≠ 0`. * A few `Nat` lemmas have been `protected`. * One docstring has been fixed.
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