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Professor Receives Praise for 40 Year Old Problem

An anonymous reader writes "The Kansas City Star is reporting that Steven Hofmann is in line to receive accolades from his peers this coming year in Madrid, Spain for solving a mathematical problem that has baffled mathematicians for over 40 years. Hofmann, a professor at the University of Missouri-Columbia, solved the 3 dimensional version of the 'Kato problem for divergence form elliptic operators with Gaussian heat kernel bounds' (say that 10 times fast!). From the article: 'For three years, starting in 1996, Hofmann worked on the problem for two to eight hours every day [...] Hofmann said the solution could allow mathematicians to better describe the behavior of waves traveling through a medium that changes over time. But beyond that, he said, it is impossible for him to explain all the real-world applications.'"

7 of 42 comments (clear)

  1. A nice little article by Starker_Kull · · Score: 4, Interesting

    It really doesn't explain much about the problem, but it does do a nice job of explaining how some people wind up in mathematics:

    "Hofmann majored in math, he said, "because it was the path of least resistance." While his friends were writing history papers that were many pages long or spending hours in a computer lab, "all I had to do was solve math problems, and it was something that came to me naturally," he said.

    "By the time you get to graduate school, even if it comes naturally, it gets hard, and that is when you begin to develop a skill to go with the ability.""

    It's nice to see an article about a mathematician that isn't a "look at the freaky math guy" or "look at the useless thing we're paying people to do" kind of writeup, but just about someone who was enjoyed playing with mathematics, and has done well by it.

    Anyone have a better explanation of what he did or where it fits in? Is it more theoretical or applied? What stuff is it related to?

    1. Re:A nice little article by alicenextdoor · · Score: 3, Informative
      The abstract of the paper in question: "We solve the Kato problem for divergence form elliptic operators whose heat kernels satisfy a pointwise Gaussian upper bound. More precisely, given the Gaussian hypothesis, we establish that the domain of the square root of a complex uniformly elliptic operator L = div(A) with bounded measurable coefficients in Rn is the Sobolev space H1(Rn) in any dimension with the estimate Lf2 f2. We note, in particular, that for such operators, the Gaussian hypothesis holds always in two dimensions."

      No, I don't understand it, either! Something tells me this is one of those classic problems that you just can't explain in words of one syllable...

      --
      of course, biting monkeys is not to everyone's taste - Konrad Lorenz
  2. Why applications? by siwelwerd · · Score: 4, Insightful

    Why is the first question about a mathematical breakthrough always "What are the applications?" Why can people not accept that mathematics is interesting in its own right?

  3. Mathematician's are players by isthisorigional · · Score: 5, Funny
    Hofmann, a professor at the University of Missouri-Columbia, solved the 3 dimensional version of the 'Kato problem for divergence form elliptic operators with Gaussian heat kernel bounds'

    Now if that doesn't give him a good pickup line, I don't know what will.

    1. Re:Mathematician's are players by fbjon · · Score: 4, Funny

      Hey baby, would you like to increase my 3-dimensional divergence by heating my kernel bounds?

      --
      True confidence comes not from realising you are as good as your peers, but that your peers are as bad as you are.
  4. Why? It's simple. by John+Nowak · · Score: 3, Insightful

    When people hear of something like this, oftentimes they can feel threatened that someone is so much more intelligent then they are. (If this is true or not, or if intelligence is even quantifiable doesn't matter -- That's how they're feeling.) As a defense, they pose the question "what is this actually good for". They take comfort in that the answer is "not much", hence allowing them to know that at least they're not wasting their time on such useless nonsense, and no matter how "intelligent" the discoverer is, he's still an "idiot" for "wasting his time" on it.

  5. Re:Nobel prize for physics! by 0xC0FFEE · · Score: 3, Informative

    That's effectively the nearest equivalent except for a few differences. First among them is that the price is given to people _under_ 40. Second the price is given every 4 years. So the Fields is way more difficult to get because of those additional constraints.