• A Problem from the Moscow Olympiad

    Updated: 2013-05-12 15:45:22
    Here is a problem from the 2012 Moscow Olympiad: There were n people at a meeting. It appears that any two people at the meeting shared exactly two common acquaintances. Prove that all the people have exactly the same number of common acquaintances at this meeting. Show that n can be greater than 4. My question is: [...]

  • I’m hosting Carnival of Mathematics #99

    Updated: 2013-05-11 19:23:11
    I'll be hosting the next Carnival of Mathematics. Please check out this URL to learn more about the carnival, to vist past carnivals, or to submit your blog article for #99. Submission deadline is 6/1/13.

  • Happy Nobel Prize Winners

    Updated: 2013-05-10 19:07:07
    I stumbled upon an article, Winners Live Longer, that says: “When 524 nominees for the Nobel Prize were examined and compared to the actual winners from 1901 to 1950, the winners lived longer by 1.4 years. Why? It seems just having won and knowing you are on top gives you a [...]

  • Four Papers in Three Weeks

    Updated: 2013-05-04 14:30:01
    I wish I could write four papers in three weeks. The title just means that I submitted four papers to the arXiv in the last three weeks—somehow, after the stress of doing my taxes ended, four of my papers converged to their final state very fast. Here are the papers with [...]

  • Do infinities exist in nature?

    Updated: 2013-04-29 10:27:53
    Listen to the podcastread more</a

  • Michelle Montgomery & Katie Fowler – Inspired by Math #30

    Updated: 2013-04-25 04:17:47
    Math contests can be a lot of fun. SIAM, the Society for Industrial and Applied Mathematics, puts on a contest every year for teams of high school juniors and seniors to propose a solution to a pressing real world problem. The contest promotes lots of hard work, collaboration, and smart thinking. And, the winners get [...]

  • Chaos: A mathematical adventure

    Updated: 2013-04-22 10:40:28
    "Everything flows. Everything is movement."read more

  • Ken Fan – Inspired by Math #29

    Updated: 2013-04-22 05:55:08
    This podcast is an experimental one in that I didn't script the questions the way I usually do. My guest, Ken Fan, and I both decided in advance that we'd go with the flow. And, in my judgment, this is the best podcast I've done -- it felt very natural. Ken is a great guy [...]

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