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D-modules, Bernstein-Sato ideals and topology of rank 1 local systems

HARVARD-MIT ALGEBRAIC GEOMETRY

October 27, 2020      3:00 pm
Speaker: Lei Wu - University of Utah

The generic vanishing theorem of Green-Lazarsfeld says that for general elements in the Picard variety of a projective manifold, their cohomology groups vanish in all degrees. Moreover, the cohomological jumping...
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Stringy invariants and toric Artin stacks

HARVARD-MIT ALGEBRAIC GEOMETRY

October 20, 2020      3:00 pm
Speaker: Jeremy Usatine - Brown University

Stringy Hodge numbers are certain generalizations, to the singular setting, of Hodge numbers. Unlike usual Hodge numbers, stringy Hodge numbers are not defined as dimensions of cohomology groups. Nonetheless, an...
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Algebraic Braids and Transcendental Retractions

HARVARD-MIT ALGEBRAIC GEOMETRY

September 29, 2020      3:00 pm
Speaker: Minh-Tam Trinh - MIT

If a complex, integral, projective curve C has only planar singularities, then its Jacobian admits a natural compactification with interesting topology. Work of Oblomkov, Shende, and others suggests the existence...
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K-stability of cubic fourfolds

HARVARD-MIT ALGEBRAIC GEOMETRY

September 22, 2020      3:00 pm
Speaker: Yuchen Liu - Princeton University

Recently there has been tremendous progress on constructing (projective) moduli spaces of Fano varieties using K-stability. In this talk, we will show that the K-moduli space of cubic fourfolds coincide...
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Descent for semi-orthogonal decompositions

HARVARD-MIT ALGEBRAIC GEOMETRY

September 8, 2020      3:00 pm
Speaker: Elden Elmanto - Harvard University

This talk is an invitation to derived methods in algebraic geometry. We will use derived algebraic geometry to give a solution to the problem of descending "bases" (semiorthogonal decompositions) on...
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Equivariant Degenerations of Plane Curve Orbits

HARVARD-MIT ALGEBRAIC GEOMETRY

March 3, 2020      3:00 pm
Speaker: Dennis Tseng - Harvard University

In a series of papers, Aluffi and Faber computed the degree of the GL3 orbit closure of an arbitrary plane curve. We attempt to generalize this to the equivariant setting...
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Stable pairs with a twist

HARVARD-MIT ALGEBRAIC GEOMETRY

February 25, 2020      3:00 pm
Speaker: Giovanni Inchiostro - Brown University

It is well known that, for pointed nodal curves, considering flat and proper families of pairs (X,D) leads to a proper moduli space. Still, while the notion of stable pairs...
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Brill-Noether Theory of Prym Varieties

HARVARD-MIT ALGEBRAIC GEOMETRY

February 11, 2020      3:00 pm
Speaker: Yoav Len - Georgia Tech

The talk will revolve around combinatorial aspects Prym varieties, a class of Abelian varieties that occurs in the presence of double covers. Pryms have deep connections with torsion points of...
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Mirrors of the Johnson-Kollár series

HARVARD-MIT ALGEBRAIC GEOMETRY

February 4, 2020      3:00 pm
Speaker: Giulia Gugiatti - Imperial College

I will construct LG mirrors for the Johnson-Kollár series of anticanonical del Pezzo surfaces in weighted projective 3-spaces. The main feature of these surfaces is that their anticanonical linear system...
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