- Series
- Combinatorics Seminar
- Time
- Friday, December 9, 2011 - 3:05pm for 1 hour (actually 50 minutes)
- Location
- Skiles 005
- Speaker
- SuHo Oh – University of Michigan, Ann Arbor – suho@math.mit.edu
- Organizer
- Prasad Tetali
Wiring diagrams are classical objects of combinatorics. Plabic graphs were
defined by Postnikov, to study the total positivity of the Grassmannian. We
will show how to generalize several definitions and properties of wiring
diagrams to Plabic graphs, proving a conjecture by Leclerc-Zelevinsky and
Scott on the way. We will begin with a brief introduction to total
positivity and end with connection to cluster algebras. Major part of the
talk comes from a joint work with Alexander Postnikov and David Speyer.