fact: Definition hel_h1map_vec_vec_fill_lemma : f (el (vec_fill a n) i) (eqweqmap (el_vec_map P (vec_fill a n) i) (hel hv i)) = f a (eqweqmap (el_vec_map_vec_fill P a i) (hel hv i)).
imports: UniMath.Foundations.All UniMath.Combinatorics.StandardFiniteSets UniMath.Combinatorics.Vectors