This virtual seminar on topics that bridge combinatorics and geometry will be held on Zoom (usually) at 11:30-12:30 Eastern (Toronto) Time on the first Wednesday of every month. Complete this form to join our mailing list.
Upcoming seminars are listed below. Previous seminars are available on other tabs by year: 2024 or 2025 or 2026. Some recordings are available on the YouTube channel.
Ahmed Ashraf (University of Toronto, Mississauga)
Christin Bibby (Louisiana State University, Baton Rouge)
Graham Denham (Western University, London ON)
We consider the relative homology of an affine hyperplane arrangement and its Poincaré dual, the cohomology at finite distance. I will present two descriptions of this latter, the first in terms of the Orlik—Solomon algebra and the second in terms of logarithmic forms having vanishing residues at infinity. If time permits, I will also explain generalizations of these results to toric arrangements.