This is a joint seminar between Yale and Columbia grad students. Some of the meetings will be in person (at Yale or Columbia), and the rest will be on zoom. You can find the schedule below.

- Time/date: Zoom meetings will be on Fridays, 2.30-4.35. In-person meetings will be on Saturdays, 1-5pm.
- Location: Yale: TBD, Colubmia: TBD.

This is a learning seminar on Springer Theory. The plan is to cover chapters 1-6 in Chriss and Ginzburg's book, following the outline below.

Outline of the seminar.

Talks will roughly be 2 hours long including a break in the middle. In-person talks will be followed by an exercise session.

Fri Sep 9 |
Yaochen Wu Symplectic Geometry 1.1-1.5 in [CG] Notes Recording |

Fri Sep 16 |
Mengwei Hu Borel-Moore homology 2.6 in [CG] Notes Recording |

In-person (Columbia) Sat Sep 24 |
Alvaro Martinez Semisimple algebraic flag varties and the nilpotent cone 3.1 and 3.2 in [CG] Notes Recording |

Fri Sep 30 |
Xuan Trung Vu Steinberg variety 3.3 in [CG] Notes Recording |

Fri Oct 7 |
Misha Goltsblat Convolution in Borel Moore homology 2.7 in [CG] Notes Recording |

In-person (Yale) Sat Oct 15 |
Xuan Trung Vu Steinberg vatiety and lagrangian constructions of Weyl group 3.3-3.4 in [CG] Notes Recording |

Fri Oct 28 |
Fan Zhou Representation of Weyl groups from geometric aspects (continued) 3.5-3.6 in [CG] Notes Recording |

Sat Nov 4 |
Do Kien Hoang Basics in equivariant K-theory and theorems in use 5 in [CG] Notes Recording |

Fri Nov 11 |
Do Kien Hoang Basics in equivariant K-theory and theorems in use (continued) 5 in [CG] Notes Recording |

Fri Nov 18 |
Do Kien Hoang Basics in equivariant K-theory and theorems in use (continued) 5 in [CG] Notes Recording |

Fri Dec 2 |
Yaochen Wu Equivariant K-groups of the flag varieties and the Steinberg varieties 6.1-6.2 in [CG] Notes Recording |

Fri Dec 9 |
Yaochen Wu Equivariant K-groups of the flag varieties and the Steinberg varieties (continued) 6.1-6.2 in [CG] Notes Recording |