Two Proofs of a Conjecture of Hori and Vafa

Aaron Bertram, Ionut Ciocan-Fontanine, Bumsig Kim

We give two proofs of a conjecture of Hori and Vafa which expresses the J-function (i.e, the generating function for 1-point descendant Gromov-Witten invariants) of a Grassmannian…