fact: Definition poly_abba := poly_abs (poly_abs (poly_arr (poly_var 1) (poly_arr (poly_var 0) (poly_arr (poly_var 0) (poly_var 1))))).
imports: List Lia Relation_Definitions Relation_Operators Operators_Properties Undecidability.SystemF.SysF Undecidability.SystemF.Autosubst.syntax Undecidability.SystemF.Autosubst.unscoped Undecidability.SystemF.Util(Facts poly_type_facts pure_term_facts term_facts typing_facts iipc2_facts pure_typing_facts) ssreflect ssrbool ssrfun