March 30: Good Friday (University Closed)

April 1: Easter Sunday (University Closed)

April 6: Last day of classes for Winter term

Steven Rayan

Date: | Thursday, February 1, 2018 |
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Nakajima quiver varieties lie at the interface of geometry and representation theory. I will discuss a particular example, hyperpolygon space, which arises from star-shaped quivers. The simplest of these varieties is a noncompact complex surface admitting the structure of an "instanton", and therefore fits nicely into the Kronheimer--Nakajima classification of ALE hyperkaehler \(4\)-manifolds, which is a geometric realization of the McKay correspondence for finite subgroups of \(SU(2)\). For more general hyperpolygon spaces, we can speculate on how this classification might be extended by studying the geometry of hyperpolygons at "infinity".

Important Dates

March 30: Good Friday (University Closed)

April 1: Easter Sunday (University Closed)

April 6: Last day of classes for Winter term

Upcoming Seminars

Rings and Modules seminar:

**T. Kucera**:
*Saturated Free Algebras and Almost Indiscernible Theories I*

Tuesday, March 27 at 14:40,
418 Machray Hall.

Colloquium talk:

**James Watmough**:
*Dispersal heterogeneity and the spreading speeds of marine invasions*

Thursday, March 29 at 15:30,
415 Machray Hall.

Rings and Modules seminar:

**T. Kucera**:
*Saturated Free Algebras and Almost Indiscernible Theories II*

Tuesday, April 3 at 14:40,
418 Machray Hall.

Colloquium talk:

**Jan Vonk**

Friday, April 6 at 14:30,
418 Machray Hall.