fact: Definition fginv_binopfun_homot {X : hSet} (l : free_monoid (setcoprod X X)) : fginv_binopfun X l = fginv l := idpath _.
imports: UniMath.MoreFoundations.Subtypes UniMath.MoreFoundations.Sets UniMath.Algebra.Monoids UniMath.Algebra.Groups UniMath.Algebra.IteratedBinaryOperations UniMath.Combinatorics.Lists