The generalized Collatz orbit criterion

Let mNm\in\mathbb{N}, and let Col\operatorname{Col} be the Collatz function defined by

Col(x)={x2if x0(mod2),3x+1if x1(mod2).\operatorname{Col}(x)=\begin{cases}\frac{x}{2}&\text{if }x\equiv0\pmod 2,\\3x+1&\text{if }x\equiv1\pmod 2.\end{cases}

Consider the sequence Coln(m)\operatorname{Col}^n(m) for n1n\geq1. Generalized Collatz conjecture. This sequence will reach 11 if and only if both of the following properties hold:

  1. limnColn(m){m}\displaystyle\lim_{n\to\infty}\operatorname{Col}^n(m)\notin\{m\}.
  2. limnColn(m)\displaystyle\lim_{n\to\infty}\operatorname{Col}^n(m)\neq\infty.

This is presented as a reformulation of the Collatz conjecture in the source. The limiting conditions are not further clarified there, and no resolution or independent justification of the claimed equivalence is supplied.

Sources & referencesView supporting material

Primary source

Benyamin Khanzadeh Holasou, “Collatz mapping on Z/10Z”, arXiv:2102.02650 (2021).

Progress summary

Never refreshed

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Solutions 0

No solutions have been posted yet.