Announcements - All
CMSA Colloquium: Derandomizing Algorithms via Spectral Graph Theory
March 4, 2020 4:45 pmSpeaker: Salil Vadhan
Randomization is a powerful tool for algorithms; it is often easier to design efficient algorithms if we allow the algorithms to "toss coins" and output a correct answer with high...
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Well-ordering principles in Proof theory and Reverse Mathematics
March 4, 2020 4:30 pmSpeaker: Michael Rathjen
There are several familiar theories of reverse mathematics that can be characterized by well-ordering principles of the form (*) "if X is well ordered then f(X) is well ordered", where...
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**CANCELED** Informal Geometry & Dynamics Seminar: Pseudo-Anosov mapping classes with large dilatation
March 4, 2020 4:00 pmSpeaker: Eko Hironaka
I'll talk about some subclasses of pseudo-Anosov mapping classes whose dilatations are bounded away from 1.
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Non-random behaviour in sums of modular symbols
March 4, 2020 3:00 pmSpeaker: Alex Cowan
We give explicit expressions for the Fourier coefficients of Eisenstein series twisted by Dirichlet characters and modular symbols on $\Gamma_0(N)$ in the case where $N$ is prime and equal to...
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Complete Kahler Ricci flow with unbounded curvature and applications
March 3, 2020 4:15 pmSpeaker: Man-Chun Lee
In this talk, we will discuss the construction of Kahler Ricci flow on complete Kahler manifolds with unbounded curvature. As a corollary, we will discuss the application related to Yau's...
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On quantum distributional symmetries for *-random variables
March 3, 2020 3:30 pmSpeaker: Weihua Liu
In this talk, we briefly review the distributional symmetries for *-random variables, which are defined by coactions of corepresentations of quantum groups. We classify all de Finetti type theorems for...
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Equivariant Degenerations of Plane Curve Orbits
March 3, 2020 3:00 pmSpeaker: Dennis Tseng
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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CMSA Special Quantum Matter/Quantum Math Seminar: Cutting and pasting 4-manifolds
March 3, 2020 10:30 amSpeaker: Robert Gompf
We will discuss techniques topologists use for understanding 4-manifolds obtained by cut-and-paste constructions. The hope is that these techniques may be useful for understanding 4-dimensional topological field theories. https://cmsa.fas.harvard.edu/quantum-matter-seminar/
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Enumerative invariants and exponential networks
March 2, 2020 12:00 pmSpeaker: Mauricio Romo
I will define and review the basics of exponential networks associated to CY 3-folds described by conic bundles. I will focus mostly on the mathematical aspects and general ideas behind...
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