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Yakov Kononov, Columbia University – Physically Inspired Mathematics Seminar
April 11, 2019 @ 4:00 pm - 5:00 pm
Title: The 2-leg vertex in K-theoretic DT theory
Abstract: K-theoretic Donaldson-Thomas counts of curves in toric and many related threefolds can be computed in terms of a certain canonical 3-valent tensor, the K-theoretic equivariant vertex.
In the talk I will derive a formula for the vertex in the case when two out of three entries are nontrivial, and discuss some applications. Based on a joint work with Andrei Okounkov and Anton Osinenko.