fact: Definition lambda_calculus_rect_var {L : lambda_calculus} {A f_var f_app f_abs f_subst f_paths n} i : lambda_calculus_rect (L := L) A f_var f_app f_abs f_subst f_paths n (var i) = f_var _ i := lambda_calculus_ind_var i.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.Combinatorics.StandardFiniteSets UniMath.Combinatorics.Tuples