Collatz Conjecture

UVa 100: The 3n + 1 problem

UVa 100: The 3n + 1 problem

The problem (or UVa 100) is the first problem at UVa’s online judge. The problems there are not in any particular order, as can be seen from this first problem which is far from being the easiest (but also very far from being the hardest). You can read the problem statement here or here. Continue reading →

Posted by Bjarki Ágúst in UVa Online Judge, 11 comments
News on proving the Collatz Conjecture

News on proving the Collatz Conjecture

A few weeks ago Gerhard Opfer posted a preprint of a paper titled An analytic approach to the Collatz 3n+1 problem. The paper claims the proof of the Collatz conjecture. In it self that isn’t something really interesting as there are probably several hundred people every year who think they have proven the Collatz conjecture. However, there is one difference here as the paper comes from a research institute. It might sound a little arrogant and imply that non-mathematicians don’t understand math. That is not what I imply, just that the sender packs a bit more punch by being from a research institute. Continue reading →

Posted by Kristian in Math, 9 comments