proposition: Lemma MappingCone_comp {C1 C2 : Complex A} (f : Morphism C1 C2) (i : hz) : (to_binop _ _ (MappingConeDiff1 f i) (to_binop _ _ (MappingConeDiff2 f i) (MappingConeDiff3 f i))) · (to_binop _ _ (MappingConeDiff1 f (i + 1)) (to_binop _ _ (MappingConeDiff2 f (i + 1)) (MappingConeDiff3 f (i + 1)))) = ZeroArrow (Additive.to_Zero A) _ _.
proof: Proof. unfold MappingConeDiff1, MappingConeDiff2, MappingConeDiff3. cbn. set (DS1 := to_BinDirectSums A (C1 (i + 1)) (C2 i)). set (DS2 := to_BinDirectSums A (C1 (i + 1 + 1)) (C2 (i + 1))). set (DS3 := to_BinDirectSums A (C1 (i + 1 + 1 + 1)) (C2 (i + 1 + 1))). rewrite to_premor_linear'. rewrite to_premor_linear'. rewrite to_postmor_linear'. rewrite to_postmor_linear'. rewrite to_postmor_linear'. rewrite to_postmor_linear'. rewrite to_postmor_linear'. rewrite to_postmor_linear'. rewrite assoc. rewrite assoc. rewrite assoc. rewrite assoc. rewrite assoc. rewrite assoc. rewrite assoc. rewrite assoc. rewrite assoc. rewrite assoc. rewrite assoc. rewrite assoc. rewrite assoc. rewrite assoc. rewrite assoc. rewrite assoc. rewrite assoc. rewrite assoc. rewrite assoc. rewrite assoc. rewrite assoc. rewrite <- (assoc _ (to_In2 DS2)). rewrite <- (assoc _ (to_In2 DS2)). rewrite <- (assoc _ (to_In2 DS2)). rewrite <- (assoc _ (to_In2 DS2)). rewrite (to_IdIn2 DS2). rewrite (to_Unel2' DS2). rewrite id_right. rewrite id_right. rewrite ZeroArrow_comp_right. rewrite ZeroArrow_comp_right. rewrite ZeroArrow_comp_left. rewrite ZeroArrow_comp_left. rewrite ZeroArrow_comp_left. rewrite ZeroArrow_comp_left. rewrite to_lunax''. rewrite to_runax''. unfold DiffTranslationComplex. rewrite <- (assoc _ (to_In1 DS2)). rewrite <- (assoc _ (to_In1 DS2)). rewrite (to_IdIn1 DS2). rewrite (to_Unel1' DS2). rewrite id_right. rewrite ZeroArrow_comp_right. rewrite ZeroArrow_comp_left. rewrite ZeroArrow_comp_left. rewrite to_runax''. rewrite to_lunax''. rewrite <- PreAdditive_invrcomp. rewrite <- PreAdditive_invrcomp. rewrite <- PreAdditive_invlcomp. rewrite <- PreAdditive_invlcomp. rewrite <- PreAdditive_invlcomp. rewrite <- PreAdditive_invlcomp. rewrite <- PreAdditive_invlcomp. rewrite <- (assoc _ (Diff C1 (i + 1))). rewrite DSq. rewrite <- (assoc _ (Diff C2 i)). rewrite DSq. rewrite inv_inv_eq. rewrite ZeroArrow_comp_right. rewrite ZeroArrow_comp_right. rewrite ZeroArrow_comp_left. rewrite ZeroArrow_comp_left. rewrite to_lunax''. rewrite to_runax''. rewrite <- (assoc _ (f (i + 1))). rewrite (MComm f (i + 1)). rewrite assoc. rewrite (@to_linvax' A (Additive.to_Zero A)). apply idpath. Qed.
imports: UniMath.Foundations.UnivalenceAxiom UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.Foundations.NaturalNumbers UniMath.MoreFoundations.PartA UniMath.Algebra.BinaryOperations UniMath.Algebra.Monoids UniMath.NumberSystems.Integers UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.TransportMorphisms UniMath.CategoryTheory.Limits.Zero UniMath.CategoryTheory.Limits.BinProducts UniMath.CategoryTheory.Limits.BinCoproducts UniMath.CategoryTheory.Limits.Equalizers UniMath.CategoryTheory.Limits.Coequalizers UniMath.CategoryTheory.Limits.Kernels UniMath.CategoryTheory.Limits.Cokernels UniMath.CategoryTheory.Limits.Pushouts UniMath.CategoryTheory.Limits.Pullbacks UniMath.CategoryTheory.Limits.BinDirectSums UniMath.CategoryTheory.Monics UniMath.CategoryTheory.Epis UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Adjunctions.Core UniMath.CategoryTheory.Equivalences.Core UniMath.CategoryTheory.CategoriesWithBinOps UniMath.CategoryTheory.PrecategoriesWithAbgrops UniMath.CategoryTheory.PreAdditive UniMath.CategoryTheory.Additive UniMath.CategoryTheory.Abelian UniMath.CategoryTheory.AbelianToAdditive UniMath.CategoryTheory.AdditiveFunctors UniMath.HomologicalAlgebra.Complexes UniMath.HomologicalAlgebra.KA UniMath.HomologicalAlgebra.TranslationFunctors