All the other readers who’ve come up and said hi to me: thanks! 🙂

]]>Are you going to be present there on 11th? I am planning to visit on that day.

— A reader of your blog.

]]>The “proof” is quicly discussed over at bit-player:

http://bit-player.org/2011/dont-try-to-read-this-proof

The article does not appear to be there anymore.

I skimmed the preprint, it does not look too hard: a clever construction in basic complex analysis; likely a good topic for a “problem presentation seminar”. Previous work evidently showed that the results on the kernel of the operators implies the Collatz conjecture, although that does not seem obvious.

]]>Collatz conjecture proved?

Written by Mike James on Network Mirror

Saturday, 04 June 2011 13:22

“A proof has been proposed for the Collatz conjecture by a German mathematician [Gerhard Opfer] who is a former student of Collatz who originally came up with this addictive problem.”

Here is a link to the article:

Here is a link to Opfer’s preprint:

http://preprint.math.uni-hamburg.de/public/papers/hbam/hbam2011-09.pdf

]]>I assume Scott is hoping for a change of direction (not involving D-Wave!) so he can stop getting congratulated, so here goes: Did anyone hear anything about the “Hailstone (or Collatz, or 3n+1) Conjecture” getting solved?

Going home from the office last night, I stopped to catch a couple songs at an open stage and get a cold one, and a former student rushed up with news of a purported proof of the “Hailstone Problem”. Once I realized what he was talking about, I assessed “Hailstone” to be an excellent name for the procedure. That was the first time I had ever heard math/computer news “on the street”!

Alas, a quick Google search turned up nothing about it today. A lot of us have thought at least a little about this problem. It should be interesting to know how it was attacked.

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