TopComb Seminar - Spring 2011


The link to the Google Group is here.

We meet on Thursdays at 10 AM in room Evans 939.

Organizers: Anton Dochtermann and Alex Engstrom .

This semester we are studying combinatorial models of vector bundles and classifying spaces, incorporating notions of oriented matroid bundles and related objects introduced by MacPherson and others. We will decide on particular papers to discuss, but nice introductions are this paper by Anderson and Davis and Matroid Bundles by Anderson.

Some other interesting papers will be posted here.

Our first talk of the term, however, will be more in lines with the theme last year. Alexander Berglund, a visitor at Stanford, will discuss his work on DJ spaces.

Here is the list of talks:
Date Topic Speaker
Mar 10, 2011
  • Homotopy invariants of DJ spaces and moment-angle complexes [B] (click here for abstract)
Alexander Berglund
Mar 17, 2011
  • Intro to combinatorial vector bundles, oriented matroids (Chap. 3 of [BLSWZ], [A], [AD])
Mar 24, 2011
  • Intro to combinatorial vector bundles, cont. ([A], [A2], [AD])
Mar 31, 2011
  • No meeting
April 7, 2011
  • No meeting
April 14, 2011
  • Chromosome packing in cell nuclei (click here for abstract)
Caroline Uhler
April 21, 2011
  • Mod 2 cohomology of combinatorial Grassmannians [AD]
April 28, 2011
  • TBA
Alex E.

[BBCG] Bahri, Bendersky, Cohen, Gitler "The polyhedral product functor".
[B] Berglund "Homotopy invariants of Davis-Januszkiewicz spaces and moment-angle complexes".
[A] Anderson "Matroid bundles" .
[A2] Anderson "Topology of combinatorial differentiable manifolds" .
[AD] Anderson, Davis, "Mod 2 cohomology of combinatorial Grassmannians".
[BLSWZ] Bj\"{o}rner, Las Vergnas, Sturmfels, White, and Ziegler, Oriented Matroids, 2nd ed. Cambridge, England: Cambridge University Press, 1999.
Click here for the website from last term's seminar. The theme was moment angle complexes and DJ spaces.