Cohomologically generic 2-complexes and 3-dimensional Poincaré complexes.
Compactly supported cohomology of systolic 3-pseudomanifolds
We show that the second group of cohomology with compact supports is nontrivial for three-dimensional systolic pseudomanifolds. It follows that groups acting geometrically on such spaces are not Poincaré duality groups.
Constructing exotic retracts, factors of manifolds, and generalized manifolds via decompositions
Corrigendum to Resolutions of homology manifolds, and the topological characterization of manifolds.