Department of Mathematics
University of Massachusetts, Lowell
One University Ave
Lowell, MA 01854
tel: (978) 934-2445
fax: (978) 934-3053
On sabbatical Fall 2012 / Spring 2013
Research interests: algebraic topology; topos theory, esp. its applications to model theory and cohomology; image processing
This is a pdf file of my talk at the New Directions in the Model Theory of Fields conference in Durham, July 2009.
Topological invariance of the combinatorial Euler characteristic of o-minimal sets
PDF file
to appear in Homology, Homotopy and Applications
Zeta functions of equivalence relations over finite fields
PDF file
to appear Finite Fields and Their Applications
Fibrations of simplicial sets
PDF file
to appear in Applied Categorical Structures
Categorification, term rewriting and the Knuth--Bendix procedure
PDF file
to appear in the Journal of Pure and Applied Algebra
Higher Cech theory
PDF file
K-Theory vol.32 (2004), no.4, pp.293-322
Simplicial torsors
DVI file
Theory and Applications of Categories vol.9 (2001), no.3, pp.43-60
Theories of presheaf type
PDF file
Journal of Symbolic Logic vol.69 (2004), no.3, pp.923-934
When is flatness coherent? (with Karazeris and Rosicky)
PDF file
Communications in Algebra vol.33 (2005), no.6, pp.1903-1912
Sheafifiable homotopy model categories
DVI file
Math. Proc. Camb. Phil. Soc. vol.129 (2000), no.3, pp.447-475
Sheafifiable homotopy model categories, Part II
DVI file
Journal of Pure and Applied Algebra vol.164 (2001), no.3, pp.307-324
Homotopoi DVI file