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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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How would you create a table of trig functions without calculators or calculus? It’s not too hard to create a table of sines at multiples of 3°. You can use the sum-angle formula for sines sin(α+β) = sin α cos β + sin β cos α. to bootstrap your way from known values to other […]

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Roughly speaking, an ergodic system is one that mixes well. You get the same result whether you average its values over time or over space. This morning I ran across the etymology of the word: In the late 1800s, the physicist Ludwig Boltzmann needed a word to express the idea that if you took an […]

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This web site started as static HTML files. Later I added a WordPress blog, but still wrote some things as static HTML pages for various reasons. Now I’ve moved most of those static pages to WordPress pages so that they’ll have the same style as the blog. There’s not a good way to find these […]

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Numericon gives the history of the words googol and googolplex: … the famous googol, 10100 (a 1 followed by 100 zeros), defined in 1929 by American mathematician Edward Kasner and named by his nine-year-old nephew, Milton Sirotta. Milton went even further and came up with the googolplex, now defined as 10googol but initially defined by […]

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Princeton University Press and No Starch Press both sent me a couple books this week. Here are a few brief words about each. The first from Princeton was The Best Writing on Mathematics 2014. My favorite chapters were The Beauty of Bounded Gaps by Jordan Ellenberg and The Lesson of Grace in Teaching by Francis Su. […]

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