Friday, November 20, 2020
11/20/2020 - 1:00pm
Kuperberg introduced oriented 3-valent graphs on the surface, called 3-webs, to study the SL_3-invariant tensor products T of irreducible representations of SL_3. Kuntson-Tao found a family of linear inequalities to characterize when T contains an invariant vector. Then Goncharov--Shen identified these inequalities with the positivity of the tropical real A moduli space. On the surface, we identify the space of 3-webs up to homotopy with certain lattice in the positive tropical real A moduli space mapping class group equivariantly. As a consequence, as predicted by Fock--Goncharov duality conjecture, these tropical points parameterize a linear basis of the regular function ring of the dual space explicitly. This is a joint work mostly with Daniel Douglas.
11/20/2020 - 6:00pm
Every one is welcome to join in a zoom call where Professor Wilhelm Schlag will be showing us how to make a Malakoff cake! Those who want to make this no-bake recipe should buy the ingredients ahead of time, or folks can just show up
Zoom link: https://yale.zoom.us/j/92425267085
If you have any problems joining the zoom call, you should email Pat Devlin.