fact: Definition t_1_W := poly_arr (poly_arr SUt0' SUt0') (poly_arr (poly_arr SUt1' SUt1') (poly_arr SUs' SUs')).
imports: List Lia Undecidability.SystemF.SysF Undecidability.SystemF.Autosubst.syntax Undecidability.SystemF.Util(Facts poly_type_facts pure_term_facts term_facts typing_facts pure_typing_facts pure_typable_prenex) ssreflect ssrbool ssrfun