# Category: Algebra

## August 1 – 31, 2019 » Quiver Varieties and Representation Theory

**Organizers: Joel Kamnitzer (Toronto), Hugh Thomas (UQAM)**

The representation theory of quivers (and related preprojective algebras) has been studied by researchers from algebra, while the geometry of quiver varieties has been studied by researchers in geometric representation theory. This activity will bring together members of these two communities to exchange recent progress and to stimulate further research and collaboration. Among other topics, we will discuss quantization of quiver varieties, Coulomb branch constructions using quiver varieties, tilting theory for preprojective algebras, and categorification of cluster algebras.

Some funding is available for graduate students and young researchers. Funding requests should include a brief letter explaining your interest and level of funding needed, as well as a cv, and should be sent to jkamnitz@math.toronto.edu .

Students should also arrange for a letter of support to be sent by their supervisor. Requests must be received by February 28; in some cases, requests received earlier may be acted on earlier.

## July 1 – 31, 2019 » Expansions, Lie Algebras and Invariants

## September 1 – 8, 2019 » Workshop on New Trends in Polynomial Differential Systems

**Organizers: Jaume Llibre (Barcelona), Dana Schlomiuk (Montréal)**

Polynomial vector fields occur in many areas of applied mathematics such as for example in population dynamics, chemistry, electrical circuits, neural networks, shock waves, laser physics, hydrodynamics, etc. They are also important from the theoretical point of view. Three problems about these systems stated more than one hundred years ago are still open. Theoretical developments in this area of research are bound to shed light on these very hard open problems and have an impact on applications. In recent years a number of new significant results were obtained on families of polynomial vector fields. The goal of this workshop is to focus on these new developments, facilitate scientific exchanges and stimulate further activity in this growing area of research.

Some of the points which will be discussed are the following:

- The algebraic invariant theory of polynomial differential systems.
- Integrability of polynomial differential systems.
- Algorithms for effective computations of algebraic and geometric properties of polynomial vector fields.
- Hilbert’s 16th problem.
- Counting problems on particular solutions of polynomial vector fields.
- Singular perturbations problems occurring in planar slow-fast systems.