(* Autor(s): Andrej Dudenhefner (1) Affiliation(s): (1) Saarland University, Saarbrücken, Germany *)
(* Undecidability Result(s): System F Inhabitation (SysF_INH) System F Typability (SysF_TYP) System F Type Checking (SysF_TC) *)
From Undecidability.SystemF.Reductions Require H10C_SAT_to_SysF_INH LU2SemiU_to_SysF_TYP SysF_TYP_to_SysF_TC.
Check SysF_INH_undec.

(* Undecidability of System F Typability *)
Theorem SysF_TYP_undec : undecidable SysF_TYP.