I gave an invited one-hour talk at a MAMLS Meeting (Washington DC, April 21-22, 2001). MAMLS is the Mid-Atlantic Mathematical Logic Seminar.

The title of my talk was ** Muchnik and Medvedev Degrees of Pi01
Subsets of 2omega**. My transparencies 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 / 24 April 2001