fact: Definition fractran_mma := mma_fractran_step 1 Q 1.
imports: List Arith Lia Undecidability.Shared.Libs.DLW(utils gcd pos vec subcode sss) Undecidability.MinskyMachines.MMA(mma_defs mma_utils) Undecidability.FRACTRAN(FRACTRAN fractran_utils)