https://www.arxiv.org/abs/2005.00346
Abstract page for arXiv paper 2005.00346: On the Collatz general problem $qn+1$
general problemcollatzqn
https://www.academia.edu/84462367/The_Undecidability_of_the_Generalized_Collatz_Problem
The Collatz problem, widely known as the 3x + 1 problem, asks whether or not a certain simple iterative process halts on all inputs. We build on earlier work...
collatz problempdfundecidabilitygeneralized