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(*   Copyright Dominique Larchey-Wendling [*]                 *)
(*             Yannick Forster            [+]                 *)
(*                                                            *)
(*                             [*] Affiliation LORIA -- CNRS  *)
(*                             [+] Affiliation Saarland Univ. *)
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(*      This file is distributed under the terms of the       *)
(*         CeCILL v2 FREE SOFTWARE LICENSE AGREEMENT          *)
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(** ** FRACTRAN_HALTING is undecidable *)
From Undecidability.MinskyMachines
From Undecidability.FRACTRAN

Theorem FRACTRAN_REG_undec : undecidable FRACTRAN_REG_HALTING.