fact: Definition K_0_universal_map {M:ExactCategory} {G:abgr} (f : ob M -> G) : (∏ E:ShortExactSequence M, f(Ob2 E) = f(Ob1 E) + f(Ob3 E)) -> monoidfun (K_0 M) G.
imports: UniMath.Tactics.EnsureStructuredProofs UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.ExactCategories.ExactCategories UniMath.Algebra.Groups UniMath.Algebra.Free_Monoids_and_Groups