In dictionaries:
collatz problem
Iterative sequence, halving or tripling.
Collatz conjecture
(mathematics) The conjecture that the process of taking a number n and, if n is even, dividing it by 2, or if n is odd, multiplying it by 3 and adding 1, then repeating this process, will eventually yield 1.
Lothar Collatz
(July 6, 1910 – September 26, 1990) a German mathematician, born in Arnsberg, Westphalia.
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