English
For any c ∈ G, the map g ↦ c g is an isometry of G (same as 206694).
Русский
Для любого c ∈ G отображение g ↦ c g является изометрией на G.
LaTeX
$$$\mathrm{edist}(c\cdot g_1, c\cdot g_2) = \mathrm{edist}(g_1, g_2)$$$
Lean4
/-- Multiplication `y ↦ y * x` as an `IsometryEquiv`. -/
@[to_additive (attr := simps! apply toEquiv) /-- Addition `y ↦ y + x` as an `IsometryEquiv`. -/
]
def mulRight [IsIsometricSMul Gᵐᵒᵖ G] (c : G) : G ≃ᵢ G
where
toEquiv := Equiv.mulRight c
isometry_toFun a b := edist_mul_right a b c