Born 27 October 1947. Andreas Blass’s primary field of research is set theory, but he has also worked in other branches of logic (including recursion theory and topos theory), in theoretical computer science, and in finite combinatorics. Amid many excursions to other areas, he has always returned to ultrafilters, especially the combinatorial properties of ultrafilters on the natural numbers.

He received his Ph.D. from Harvard University in 1970, under the supervision of Frank Wattenberg, and he has been at the University of Michigan ever since, except for sabbaticals at Wisconsin, Penn State, and now the Fields Institute. For each of the last 10 years, he has spent part or all of the summer as a visiting researcher at Microsoft Research.

Personal website


Recent and upcoming talks by Andreas Blass

Andreas Blass: Partition Theorems and Ultrafilters Part 2

Monday, March 19, 2012, from 4 to 5:30pm East Hall, room 2866 Speaker: Andreas Blass (University of Michigan) Title: Partition Theorems and Ultrafilters Part 2 Abstract: I’ll continue to speak on “Partition theorems and ultrafilters”. continue reading…

Andreas Blass: Partition Theorems and Ultrafilters Part 1

Monday, March 12, 2012, from 4 to 5:30pm East Hall, room 2866 Speaker: Andreas Blass (University of Michigan) Title: Partition Theorems and Ultrafilters Abstract: My long-term goal is to discuss a notion of forcing that produces an ultrafilter on the natural numbers that (1) is not a P-point but (2) has the strongest partition properties that are possible subject to (1). continue reading…

Logic Colloquium 2012, July 12 – 18 2012

The 2012 ASL European Summer Meeting will take place 12th-18th July 2012 (University of Manchester). Tutorials Ilijas Farah: Elliott’s program and descriptive set theory (abstract) Antonio Montalbán: Reverse mathematics (abstract) Boris Zilber: Pseudo-analytic structures: model theory and algebraic geometry (abstract) Plenary Lectures Jeremy Avigad: Computability and convergence (abstract) Andreas R. continue reading…

46th Spring Topology and Dynamics Conference, March 22 – 24, 2012

The 2012 Spring Topology and Dynamics Conference will take place March 22-24, 2012 (Mexico City, Mexico) Invited Speakers Plenary speakers Alejandro Illanes, Universidad Nacional Autonoma de Mexico Tao Li, Boston College Pedro Ontaneda, Binghamton University Eric Swenson, Brigham Young University Jan van Mill, Vrieje Universiteit Netherlands Alexander Blokh, University of Alabama at Birmingham. continue reading…