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This page was the home of the Xtraordinary cohomology theory & K-theory Collective Discussion group^* for the spring 2012 semester. However, that semester the xkcd group was in hibernation while its three founding members weren't all in the Bay Area. We came back eventually! If you're somehow reading this and it's spring 2012, please peruse the (other) archives.

All talks at Berkeley were on Berkeley time (i.e. they started 10 minutes late).

^* the xkcd group -- making xkcd not stand for nothing since 2010!