November 30, 2021 to December 2, 2021
Le Bois-Marie
Europe/Paris timezone

How to Conjecture and Prove that the Generating Function of the Yang- Zagier Numbers is Algebraic (in person)

Dec 1, 2021, 2:50 PM
Centre de conférences Marilyn et James Simons (Le Bois-Marie)

Centre de conférences Marilyn et James Simons

Le Bois-Marie

35, route de Chartres 91440 Bures-sur-Yvette


Sergey Yurkevich (University of Vienna & INRIA)


In a recent paper Don Zagier mentions a mysterious integer sequence $(a_{n})_{n≥0}$ which arises from a solution of a topological ODE discovered by Marco Bertola, Boris Dubrovin and Di Yang. In my talk I show how to conjecture, prove and even quantify that $(a_{n})_{n≥0}$ actually admits an algebraic generating function which is therefore a very particular period. The methods are based on experimental mathematics and algorithmic ideas in differential Galois theory, which I will show in the interactive part of the talk. The presentation is based on joint work with A. Bostan and J.-A. Weil.

Presentation materials