| Wednesday 30 April 2025 | |
| Events for day: Wednesday 30 April 2025 |
| 14:00 - 15:00 Combinatorics and Computing Weekly Seminar Strategies for infinite Maker-Breaker games School MATHEMATICS Imagine a game played between two players, Maker and Breaker, on an infinite complete graph G. The players alternately claim edges of G, beginning with Maker, and play continues forever. Maker's aim is that by the end of the game she should have claimed all edges of an infinite complete subgraph of G, and Breaker's aim is to prevent this. I will discuss a number of simple variants of this game and examine who has a winning strategy in each case. Zoom room information: https://us06web.zoom.us/j/84906984159?pwd=BCWaIbXBuku3A5I84zNg9mHFxVZjXD.1 Meeting ID: 849 0698 4159 Passcode: 362880 Venue: Niavaran ... 17:30 - 19:00 Algebraic Geometry Biweekly Webinar Lagrangian Subspaces of the Moduli Space of Simple Sheaves on K3 Surfaces School MATHEMATICS Let $X$ be a smooth connected projective $K3$ surface over the complex numbers and let $Spl(r; c_1, c_2)$ be the moduli space of simple sheaves on $X$ of fixed rank $r$ and Chern classes $c_1$ and $c_2$. In 1984, Mukai proved that $Spl(r; c_1, c_2)$ is a smooth algebraic space of dimension $2rc_2-(r-1)c_1^2-2r^2+2$ with a natural symplectic sstricture, i.e., it has a non-degenerate closed holomorphic 2-form. In my talk, I will present a useful method to construct isotropic and Lagrangian subspaces of $Spl(r; c_1, c_2)$. This is joint work with Barbara Fantechi. https://zoom.us/join Meeting ID: 9086116889 18:00 - 19:00 Geometry and Topology Weekly Seminar Crossing singularities into non-Kahler complex geometry School MATHEMATICS Kahler Calabi-Yau threefolds can be deformed into a non-Kahler object by degeneration and resolution. We will discuss various aspects of the geometrization of this process by special non-Kahler metrics. This is joint work with T. Collins and S.-T. Yau. google meet's link: https://meet.google.com/thp-rcvp-fhd Venue: , (Online) ... |