sdiv_left_cancel

∀ {G : Type u_1} {P : Type u_2} [inst : Group G] [T : Torsor G P] {p₁ p₂ p : P}, p₁ /ₛ p = p₂ /ₛ p → p₁ = p₂

If dividing two points by the same point produces equal results, those points are equal.

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