The maths meme that has been distracting mathematicians for a century
A tree-like form arises out of numerical connections in a famous maths puzzle known as the Collatz conjecture Marzio De Biasi/Algoritmarte Almost a century ago, a mathematician came up with a puzzle that was so seemingly simple and yet so fiendishly difficult that it has been distracting other mathematicians ever since. It has become a meme that jumps from brain to brain, with many people claiming to have solved it, only to have their hopes dashed as the proof unravels. And be warned – once I explain the rules, you will immediately want to start playing around with it yourself, and I take no responsibility for how much of your time you waste. It starts a bit like a magic trick. Pick a number, any number – well, at least any positive whole number; don’t try to get clever with something like pi. If it is an even number, divide it by 2. If it is an odd number, multiply it by 3 and add 1. Next, apply the same rules to the resulting number. …









