`BookProof.ChapterMackeyImprimitivity.inv_smul_section` (hs : ∀ x, s x • x₀ = x) (x : X) : (s x)⁻¹ • x = x₀

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`BookProof.ChapterMackeyImprimitivity.inv_smul_section` (hs : ∀ x, s x • x₀ = x) (x : X) : (s x)⁻¹ • x = x₀ · Prove2Me