mathlib3

f951e201 - feat(algebraic_topology/dold_kan): the normalized Moore complex is homotopy equivalent to the alternating face map complex (#16246)

feat(algebraic_topology/dold_kan): the normalized Moore complex is homotopy equivalent to the alternating face map complex (#16246) In this PR, when the category `A` is abelian, we obtain the homotopy equivalence `homotopy_equiv_normalized_Moore_complex_alternating_face_map_complex` between the normalized Moore complex and the alternating face map complex of a simplicial object in `A`. Co-authored-by: Joël Riou <37772949+joelriou@users.noreply.github.com>