71 citations · 177 across the 21 of their papers we have counts for
22 papers
Tautological characteristic classes III: the Witt class for PSL(2)
Jan Dymara, Tadeusz Januszkiewicz
We explain the relation between the Witt class and the universal equicommutative class for PSL(2,K). We discuss an analogue of the Milnor-Wood inequality.
Tautological characteristic classes II: the Witt class
Jan Dymara, Tadeusz Januszkiewicz
Let be an arbitrary infinite field. The cohomology group contains the class of the universal central extension. When studying representations of fu…
Tautological characteristic classes I
Jan Dymara, Tadeusz Januszkiewicz
We discuss the formalism of tautological characteristic classes of flat bundles. Applied to it yields the Witt class of Nekovar. Applied to , the general li…
Constructions of k-regular maps using finite local schemes
Jarosław Buczyński, Tadeusz Januszkiewicz, Joachim Jelisiejew +1
A continuous map from R^m to R^N or from C^m to C^N is called k-regular if the images of any points are linearly independent. Given integers m and k a problem going back to Che…
Cohomology of hyperplane complements with group ring coefficients
Michael W Davis, Tadeusz Januszkiewicz, Ian J Leary +1
We compute the cohomology with group ring coefficients of the complement of a finite collection of affine hyperplanes in a finite dimensional complex vector space. It is nonzero in…
Groups possessing extensive hierarchical decompositions
T. Januszkiewicz, P. H. Kropholler, I. J. Leary
Kropholler's class of groups is the smallest class of groups which contains all finite groups and is closed under the following operator: whenever admits a finite-dimensional c…