Mathematical Sciences Research Institute

Home » Workshop » Schedules » Equivariant Methods in Discrete Geometry: Problems and Progress

Equivariant Methods in Discrete Geometry: Problems and Progress

Introductory Workshop: Geometric and Topological Combinatorics September 05, 2017 - September 08, 2017

September 07, 2017 (09:00 AM PDT - 10:00 AM PDT)
Speaker(s): G√ľnter Ziegler (Freie Universit√§t Berlin)
Location: MSRI: Simons Auditorium
Primary Mathematics Subject Classification No Primary AMS MSC
Secondary Mathematics Subject Classification No Secondary AMS MSC


In this lecture, I will discuss three different problems from Discrete Geometry,

  • the Topological Tverberg Problem,
  •  the Colored Tverberg Problem, and
  • the Grünbaum Hyperplane Problem.

These problems have many things in common:

  • They are easy to state, and may look harmless,
  • They have very nice and classical configuration spaces,
  • they may be attacked by ``Equivariant Obstruction Theory'',
  • this solves the problems --- but only partially,
  • which leads us to ask more questions, look for new tools ...
  • and this yields surprising new results.

(Joint work with Pavle Blagojevic, Florian Frick, Albert Haase, and Benjamin Matschke)

Supplements No Notes/Supplements Uploaded
Video/Audio Files


H.264 Video 10-Ziegler.mp4 189 MB video/mp4 rtsp://videos.msri.org/data/000/029/360/original/10-Ziegler.mp4 Download
Buy the DVD

If none of the options work for you, you can always buy the DVD of this lecture. The videos are sold at cost for $20USD (shipping included). Please Click Here to send an email to MSRI to purchase the DVD.

See more of our Streaming videos on our main VMath - Streaming Video page.