proposition: Lemma Book_5_2_i_prop_eq : forall n, Book_5_2_i n = Book_5_2_ii n.
proof: Proof. induction n; simpl; trivial. Defined.
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)