fact: Definition ReadCurrentSymbols_T : tRel sigSim 1 := fun tin k => exists T, tin[@Fin0] ≃ T /\ ReadCurrentSymbols_steps T <= k.
imports: Undecidability.TM.Basic.Mono Undecidability.TM.Combinators.Combinators Undecidability.TM.Code.Code Undecidability.TM.Single.EncodeTapes Undecidability.TM.Compound(TMTac MoveToSymbol Multi Shift)