In order to enable an iCal export link, your account needs to have an API key created. This key enables other applications to access data from within Indico even when you are neither using nor logged into the Indico system yourself with the link provided. Once created, you can manage your key at any time by going to 'My Profile' and looking under the tab entitled 'HTTP API'. Further information about HTTP API keys can be found in the Indico documentation.
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Navid Nabijou (Imperial college): Relative quasimaps and a quantum Lefschetz theorem
I 001 (Angers)
The theory of stable quasimaps is an important tool in modern enumerative geometry, providing an alternative system of curve counts to the usual Gromov-Witten invariants. In joint work with Luca Battistella, we define moduli spaces of relative stable quasimaps to a pair (X,Y), where Y is a hyperplane section in X. Intuitively these spaces parametrise quasimaps in X with specified orders of tangency with Y, and can be used to define relative quasimap invariants. By investigating these moduli spaces we obtain a quantum Lefschetz formula, expressing the quasimap invariants of Y in terms of the invariants of X. Since the I-function from mirror symmetry is equal to a generating function for these quasimap invariants, this result can be viewed as a “quantum Lefschetz theorem for I-functions.” It also agrees with an earlier formula obtained by Ciocan-Fontanine and Kim.