Difference between revisions of "Algebra and Algebraic Geometry Seminar Spring 2021"
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Revision as of 08:03, 15 March 2021
The Virtual Seminar will take place on Fridays at 2:30 pm via Zoom. We will also link to relevant or interesting Zoom talks outside of the seminar.
Contents
Algebra and Algebraic Geometry Mailing List
- Please join the AGS mailing list by sending an email to ags+join@g-groups.wisc.edu to hear about upcoming seminars, lunches, and other algebraic geometry events in the department (it is possible you must be on a math department computer to use this link).
COVID-19 Update
As a result of Covid-19, the seminar for this semester will be held virtually. The default Zoom link for the seminar is https://uwmadison.zoom.us/j/9502605167 (sometimes we will have to use a different meeting link, if Michael K cannot host that day).
Spring 2021 Schedule
date | speaker | title | link to talk |
---|---|---|---|
January 29 | Nir Avni (Northwestern) | First order rigidity for higher rank lattices | Zoom link |
February 12 | Marian Aprodu (Bucharest) | Koszul modules, resonance varieties and applications | Zoom link |
February 19 | Dhruv Ranganathan (Cambridge) | Logarithmic Donaldson-Thomas theory | Zoom link |
February 26 | Philip Engel (UGA) | Compact K3 moduli | Zoom link |
March 5 | Andreas Knutsen (University of Bergen) | Genus two curves on abelian surfaces | Zoom link |
March 12 | Michael Groechenig (University of Toronto) | Rigid local systems | Zoom link |
March 19 | Daniele Agostini (MPI Leipzig) | Effective Torelli theorem | Zoom link |
March 26 | Gavril Farkas (Humboldt-Universitaet zu Berlin) | TBA | Zoom link |
April 9 | Hannah Larson (Stanford) | TBA | Zoom link |
April 16 | Eyal Subag (Bar Ilan - Israel) | TBA | Zoom link |
April 23 | Gurbir Dhillon (Yale) | TBA | Zoom link |
April 30 | Iordan Ganev (Weizmann) | TBA | Zoom link |
is two and there are finitely many curves of such genus. In analogy
with Chen's results concerning rational curves in primitive linear systems on K3 surfaces, it is natural to ask whether all such curves are nodal. In the seminar I will present joint work with Margherita Lelli-Chiesa (arXiv:1901.07603) where we prove that this holds true if and only if d_2 is not divisible by 4. In the cases where d_2 is a multiple of 4, we show the existence of curves in |L| having a triple, 4-tuple or 6-tuple point, and prove that these are the only types of unnodal singularities a genus 2 curve in |L| may acquire. Michael GroechenigTitle: Rigid Local Systems Abstract: An irreducible representation of a finitely generated group G is called rigid, if it induces an isolated point in the moduli space of representations. For G being the fundamental group of a complex projective manifold, Simpson conjectured that rigid representations should have integral monodromy and more generally, be of geometric origin. In this talk I will give an overview about what is currently known about Simpson’s conjectures and will present a few results joint with H. Esnault. Daniele AgostiniTitle: Effective Torelli theorem Abstract: Torelli's theorem is a foundational result of classical algebraic geometry, asserting that a smooth curve can be recovered from its Jacobian. There are many effective proofs of this result, that can even be implemented on a computer. In this talk, I will present this circle of ideas. In particular, I will focus on a method based on the KP equation in mathematical physics, that I have recently implemented together with Türkü Çelik and Demir Eken.
Eyal SubagTBA TBA Gurbir DhillonTBA TBA |