Require Undecidability.MinskyMachines.Reductions.BSM_MM.
Require Undecidability.FRACTRAN.Reductions.MM_FRACTRAN.
Require Undecidability.MinskyMachines.Reductions.FRACTRAN_to_MMA2.
Require Undecidability.MinskyMachines.Reductions.MMA2_to_MM2.

Theorem reduction : BSM_HALTING ⪯ MM2_HALTING.