fact: Definition Equivalence_Book_eq_2_3_6_and_Book_eq_2_3_6 {A B : Type} {x y : A} (p : x = y) (f : A -> B) : IsEquiv (Book_eq_2_3_6 p f).
imports: HoTT(Basics Types HProp HSet Projective TruncType Truncations Modalities.Notnot Modalities.Open Modalities.Closed BoundedSearch Equiv.BiInv Spaces.Nat Spaces.Torus.TorusEquivCircles Metatheory.Core Metatheory.FunextVarieties)