This is the website of the topology seminar at Northeastern University, organized by Ben Knudsen, Jose Perea, and Alex Suciu. The scope of the seminar encompasses algebraic, geometric, combinatorial, and applied topology. The seminar meets on Tuesdays at 4:30 PM Boston time unless otherwise noted. Talks marked “in-person” occur in Lake Hall 509 at Northeastern, while those marked “virtual” stream live (Zoom meeting 975 7713 9071, password “topology”). Please email Ben if you’d like to be added to the mailing list. Below is the schedule of upcoming talks; click the links or see the calendar for abstracts.

• February 1 (noon): Giovanni Paolini (Amazon and Caltech, virtual) (note special time!), The homotopy type of complexified hyperplane arrangements
• February 8: Jon McCammond (UC Santa Barbara, virtual), Dual braids and the braid arrangement
• February 15: Luis Scoccola (Northeastern, in-person), Stability of homological invariants of multiparameter persistence modules
• February 22: Roberto Pagaria (Bologna, in-person), Asymptotic growth of Betti numbers of configuration spaces of an elliptic curve
• March 1: Thomas Brüstle (Sherbrooke, in-person), Homological approximations in persistence theory
• March 8 (noon): Florian Naef (Trinity, in-person) (note special time!), Trace amounts of torsion found
• March 8: Marcy Robertson (Melbourne, in-person), Automorphisms of seamed surfaces, modular operads and Galois actions
• March 22 (noon): Vladimir Dotsenko (Strasbourg, virtual) (note special time!), Rational homotopy type of the moduli space of stable rational curves
• March 29: Vance Blankers (Northeastern, in-person), Classifying compactifications of the moduli space of curves
• April 5: Radmila Sazdanovic (NC State, virtual), Bilinear pairings on two-dimensional cobordisms and generalizations of the Deligne category
• April 12 (noon): Andrew Blumberg (Columbia, virtual) (note special time!), Probabilistic stability theorems for topological data analysis
• April 19: Joshua Wen (Northeastern, in-person), The quantum Harish-Chandra homomorphism for GL_n
• April 26: Matthew Kahle (Ohio State, virtual), Configuration spaces of particles: homological solid, liquid, and gas
• May 3: Najib Idrissi (Paris Cité, in-person), Formality and non-formality of Swiss-Cheese operads and variants
• May 10: Marissa Masden (Oregon, in-person), Exact combinatorial and topological data for ReLU networks’ linear regions