English
For f : ι → α and g : ι → β with α a commutative ordered group and IsOrderedMonoid, the monovariation of the inverse of f with g is equivalent to the antivariation of f with g.
Русский
Пусть f: ι→α, g: ι→β и α — коммутативная упорядоченная группа с IsOrderedMonoid; моноварьированность f^{-1} с g эквивалентна антивариантности f с g.
LaTeX
$$$$\\operatorname{Monovary}(f^{-1}, g) \\iff \\operatorname{Antivary}(f, g).$$$$
Lean4
@[to_additive (attr := simp)]
theorem monovary_inv_left : Monovary f⁻¹ g ↔ Antivary f g := by simp [Monovary, Antivary]