### Description

I have worked as a math professor, programmer, consultant, manager, and statistician. I enjoy combining these skills and experiences to solve problems and see the solutions carried out.

### The Endeavour's Latest Posts

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If you walk across the Seine in Paris on the Pont des Arts you’ll see thousands and thousands of love locks. I saw this morning that Heidelberg has its own modest collection of love locks on the Old Bridge across the Neckar. These may be new. If they were here last year, I didn’t notice […]

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I’m in Heidelberg again for the Heidelberg Laureate Forum. Next week I will be writing about the forum on the HLF blog and posting on Twitter with hash tag #hlf14.

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College courses often begin by trying to weaken your confidence in common sense. For example, a psychology course might start by presenting optical illusions to show that there are limits to your ability to perceive the world accurately. I’ve seen at least one physics textbook that also starts with optical illusions to emphasize the need […]

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The other day I was driving by our veterinarian’s office and saw that the marquee said something like “Prevention is less expensive than treatment.” That’s sometimes true, but certainly not always. This evening I ran across a couple lines from Ed Catmull that are more accurate than the vet’s quote. Do not fall for the […]

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Let xn be a sequence of non-negative numbers. Then the sum of their running geometric means is bounded by e times their sum. In symbols The inequality is strict unless all the x‘s are zero, and the constant e on the right side is optimal. Torsten Carleman proved this theorem in 1923.

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