- Anna Weigandt, University of Michigan
- Transition on Grothendieck Polynomials, https://msu.zoom.us/j/5476724571, passcode: MthMus
- 10/07/2020
- 3:00 PM - 3:50 PM
- Online (virtual meeting)
(Virtual Meeting Link)
- Bruce E Sagan (bsagan@msu.edu)
Using anti-diagonal Gröbner geometry, Knutson and Miller explained how Grothendieck polynomials arise as K-polynomials of matrix Schubert varieties. We will discuss how Lascoux's transition equations for Grothendieck polynomials can be realized geometrically through "almost anti-diagonal" Gröbner degeneration of matrix Schubert varieties. In particular, under this strange term order, Fulton's generators form a Gröbner basis. Our proof involves studying the lattice of alternating sign matrices.