## Columbia Algebraic Geometry Seminar## Fall 2021 |
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The Columbia Algebraic Geometry Seminar takes place on Fridays at 3:30 pm in 417 Mathematics Hall on the Columbia campus. Some talks will be streamed on Zoom (password is the number of lines on a cubic surface).

The seminar is organized by Giulia Saccà, Will Sawin, and Akash Sengupta.

Click on the title of a talk for the abstract (if available).

September 17 | Johan de Jong | In-person | Columbia University | Locally free twisted sheaves of infinite rank |

September 24 | Ziquan Zhuang | Zoom | MIT | Properness of the K-moduli space |

October 1 | Konstantin Aleshkin | In-person | Columbia University | GLSM and wall-crossing for the mirror quintic |

October 8 | Kristin DeVleming | Zoom | UMass Amherst | K stability and birational geometry of moduli spaces of quartic K3 surfaces |

October 15 Special time: 1:30 pm |
Joaquín Moraga | Zoom | Princeton University | Reductive quotient singularities |

October 22 | Melody Chan | Zoom | Brown University | The top-weight rational cohomology of A_g |

October 29 | Giulia Saccà | In-person | Columbia University | Compactification of Lagrangian fibrations |

November 5 | Jenia Tevalev | In-person | UMass Amherst | Semi-orthogonal decompositions of moduli spaces |

November 12 | Maksym Fedorchuk | In-person | Boston College | Kollár stability of low degree del Pezzo fibrations |

November 19 | Carolina Araujo | Zoom | Instituto Nacional de Matemática Pura e Aplicada | Birational geometry of Calabi-Yau pairs |

November 26 | No Seminar | Thanksgiving | ||

December 3 | Eyal Markman | In-person | UMass Amherst | Modular vector bundles over compact hyperkahler manifolds |

December 10 | Special doubleheader event. Note the special times | |||

2:00 pm | Jason Starr | In-person | Stonybrook University | Connectedness theorems in algebraic geometry |

3:30 pm | Tony Pantev | In-person | University of Pennsylvania | TBD |

Schedules from the past: F '97 - F '00, S '01, F '01, S '02, F '02, S '03, F '03, S '04, F '04, S '05, F '05, S '06, F '06, S '07, F '07, S '08, F '08, S '09, F '09, S '10, F '10, S '11, F '11, S '12, F '12, S '13, F '13, S '14, F '14, S '15, F '15, S '16, F '16, S '17, F '17, S '18, F '18, S '19, F '19, S '20, F '20, S '21

This page is maintained by Will Sawin.