On May 2, 2001 I gave an invited one-hour talk at the Department of Mathematics of the University of Minnesota.

The title of my talk was ** Muchnik and Medvedev Degrees of Pi01
Subsets of 2omega**. My slides are available in several
formats: DVI, PDF, PS.
My abstract is available in several
formats: DVI, PDF, PS, HTML.

A list of my recent and upcoming talks is available.

My publication list is available.

I run FOM, an automated e-mail list for discussing foundations of mathematics.

t20@psu.edu / 30 April 2001