11b8337a4511b3768q99 butinthissection collatz-problem computerscience dynamicalsystemsandergodictheory ergodictheory folge harmonicanalysis iteration noneoftheabove numbertheory polynom polynomials recurrences reihe relationswithnumbertheoryandharmonicanalysis sequences(mathematics) sequencesandsets specialsequencesandpolynomials theoryofcomputing