Links from the first meeting of Intersections: K∩W.
A handful of photos from Cambridge.
More photos: a handful from Toronto, and some from a recent trip to Paris.
More photos, these ones from a day trip to Niagara Falls. Also, some frogs.
Photos from my first month in Toronto.
I have uploaded the photos from from my trip to Cleveland and the Bay Area in August 2010 to Flickr.
Notes for my seminar talks on covering numbers. This is the final version.
A precise citation for a quote widely attributed to Salvador Dalí.
About 30 photos from my trip to Paris.
A draft of notes for my seminar talks on volume ratio. This version includes material presented from Nov 23 to Jan 25 and some material planned for future seminars.
This website has reached a new and astounding level of hipness: it now has a news feed.
About 50 photos from my trip to Texas A&M.
Central binomial coefficients are numbers of the form $\binom{2n}{n}$. This document gives a few exercises, with strong hints, on elementary methods of estimating such numbers. Here "elementary" means something like "not using Stirling's approximation".
About 20 photos from the 2008 Gibson reunion.