A hyperplane arrangement gives a stratification on a vector space, whose topology is encoded in an associated category of perverse sheaves. This category has an algebraic description due to Kapranov and Schechtman. The interplay between perverse sheaves and their restrictions to the open and closed strata is known as recollement. In this talk, I will describe recollement of perverse sheaves purely in terms of the algebra. I will also discuss the special case of finite Coxeter arrangements, which has connections to the study of braid groups.


About Pure mathematics seminars

We present regular seminars on a range of pure mathematics interests. Students, staff and visitors to UQ are welcome to attend, and to suggest speakers and topics.

Seminars are usually held on Tuesdays from 3pm to 3.50pm.

Talks comprise 45 minutes of speaking time plus five minutes for questions and discussion.

Information for speakers

Researchers in all pure mathematics fields attend our seminars, so please aim your presentation at a general mathematical audience.

Contact us

To volunteer to talk or to suggest a speaker, email Ole Warnaar.

Venue

Goddard Building #8
Room: 
212