Time and location
The OttawaCarleton joint algebra seminar meets during the academic year approximately once per week at either The University of Ottawa or Carleton University. Unless otherwise indicated, time and location are as follows:
 University of Ottawa: Monday, 1:00pm–2:00pm, STM 664
 Carleton University: Monday, 1:00pm–2:00pm, HP 4325
To be added to the mailing list for this seminar, subscribe to this group. To schedule a talk, please contact Alistair Savage. For information on the seminar in past semesters, click here.
Talks
Date  Speaker  Title (click for abstract) 

Jan 13 (O)  Peter Latham (Ottawa) 
Classifying typical representations
Let G be the group of rational points of a connected reductive group over a padic field. Under very mild hypotheses on p, we have a complete, explicit classification of the irreducible complex representations of G, with many desirable properties—the classification is in terms of what Bushnell and Kutzko call typical representations. It's expected that this classification is, up to minor renormalization, the only one with such nice properties, but this is only currently known in a few special cases. I'll explain joint work with Monica Nevins which reduces the general case to some explicit questions about the geometry of the Bruhat–Tits building of G.

Jan 20 (O)  Chris Dionne 
Multipoint Seshadri constants and nef cones
In this talk we'll give an introduction to multipoint Seshadri constants for ample line bundles on smooth projective varieties, and discuss their relationship with the nef cone. We'll also go over the structure of the nef cone as described by a theorem of Mori, and show some explicit calculations for blowups of \(\mathbb{P}^1 \times \mathbb{P}^1\) at an even number of points greater than eight.

Jan 27  
Feb 3  
Feb 10  
Feb 24  
Mar 2  
Mar 9  
Mar 16 (C)  David Wehlau (Queen's) 
TBD
TBD

Mar 23  
Mar 30  
Apr 6 (C)  Nicholas Meadows (Haifa University) 
Toda Brackets in \((\infty, 1)\)categories
Toda Brackets are a kind of higher homotopy operation, originally introduced by Toda to study unstable homotopy groups of spheres. They can be viewed as successive obstructions to rectifying a certain kind of homotopy commutative diagram. Baues, Blanc and their collaborators gave a more general definition of Toda brackets (and other higher homotopy operations) in pointed simplicial (model) categories. In this talk will explain how to generalize their work further, defining Toda brackets (and an unstable analogue) in two different models of $(\infty, 1)$categories: simplicially enriched categories and quasicategories. We will also explain how to construct BousfieldKan type spectral sequences in quasicategories satisfying certain assumptions, and explain how the differentials in these spectral sequences can be described in terms of higher homotopy operations. This is in progress work with David Blanc. 
*graduate student