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Event Series Mathematical Physics and Algebraic Geometry Seminar

Tyurin degenerations, Relative Lagrangian foliations and categorification of DT invariants

Virtual

https://youtu.be/O2U7elI0mbo Mathematical Physics and Algebraic Geometry Seminar Speaker: Artan Sheshmani (BIMSA) Title: Tyurin degenerations, Relative Lagrangian foliations and categorification of DT invariants Abstract: We discuss construction of a derived Lagrangian intersection theory of moduli spaces of perfect complexes, with support on divisors on compact Calabi-Yau threefolds. Our goal is to compute deformation invariants associated to a fixed […]

Workshop on Symmetries and Gravity

CMSA 20 Garden Street Cambridge, Massachusetts 02138 United States

Workshop on Symmetries and Gravity Dates: January 21-24, 2025 Location: Harvard CMSA, 20 Garden Street, Cambridge, MA 02138 Organizers: Ibrahima Bah (Johns Hopkins University), Patrick Jefferson (Johns Hopkins University), Yiming Chen (Stanford University) Description: There is a widespread belief, that has its origins in work from the 70s, that a theory of quantum gravity cannot […]

Event Series Foundation Seminar

Joint BHI/CMSA Foundation Seminar: Quantum Criticality in Black Hole Dynamics

Black Hole Initiative, 20 Garden Street, Cambridge MA CMSA, 20 Garden Street, Cambridge, MA, United States

Joint BHI/CMSA Foundation Seminar Location: BHI Seminar Room Speaker: Uri Kol, Harvard CMSA Title: Quantum Criticality in Black Hole Dynamics Abstract: Black hole perturbation theory captures a few important effects in the dynamics of binary mergers, such as tidal deformations and the decay of ringdown modes, as well as the physics of the photon ring. […]

A homotopy of 2d SCFTs and an implication for Topological Modular Forms

CMSA Room G10 CMSA, 20 Garden Street, Cambridge, MA, United States

Quantum Field Theory and Physical Mathematics Seminar Speaker: Vivek Saxena (YITP Stony Brook and NHETC Rutgers) Title: A homotopy of 2d SCFTs and an implication for Topological Modular Forms Abstract: The Segal-Stolz-Teichner conjecture states that there exists an isomorphism between deformation classes of two-dimensional N=(0,1) superconformal field theories (SCFTs) and generalized cohomology classes known as […]

Event Series Mathematical Physics and Algebraic Geometry Seminar

Stochastic Process and Noncommutative Geometry

Hybrid

Mathematical Physics and Algebraic Geometry Seminar Speaker: Zichang Wang (Tsinghua University) Title: Stochastic Process and Noncommutative Geometry Abstract: We explain a stochastic approach to topological field theory and present a case study of quantum mechanical model and its relation to noncommutative geometry. For detail reference, see https://arxiv.org/abs/2501.12360    

CMSA/MATH Welcome Back Gathering

CMSA 20 Garden Street Cambridge, Massachusetts 02138 United States

Thursday, Jan. 30, 2025 4:00 pm All CMSA and Math affiliates are invited.  

Smooth projective fibrations over the projective line and their sections

CMSA Room G10 CMSA, 20 Garden Street, Cambridge, MA, United States

Member Seminar Speaker: Iacopo Brivio Title: Smooth projective fibrations over the projective line and their sections Abstract: Suppose $f\colon X\to \mathbf{CP}^1$ is a smooth projective fibration, is it then true that $f$ has a section? This deceptively simple result was established by Seidel and McDuff using deep methods of symplectic geometry. Alex Pieloch recently generalized this to morphisms […]

Topological to Gravitational Leptogenesis, via Ultra Unification 

CMSA Room G10 CMSA, 20 Garden Street, Cambridge, MA, United States

Quantum Field Theory and Physical Mathematics Seminar Speaker: Juven Wang (LIMS, Royal Institution) Title: Topological to Gravitational Leptogenesis, via Ultra Unification Abstract: We propose a new mechanism for leptogenesis, named Topological Leptogenesis, in which dark matter consists of topological order, so gapped anyon excitations decay to generate the Standard Model lepton asymmetry. Topological Leptogenesis is in […]

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Rational approximation and the AAA algorithm

CMSA Room G10 CMSA, 20 Garden Street, Cambridge, MA, United States

Colloquium Speaker: Nick Trefethen, Harvard University Title: Rational approximation and the AAA algorithm Approximation by rational functions used to be mainly a theoretical subject, but with the introduction of the AAA algorithm in 2018, it became computationally practical and indeed easy. The implications for what we can do numerically are enormous. This talk will outline […]

The mass angular momentum inequality

Virtual

General Relativity Seminar Speaker: Gilbert Weinstein, Ariel University Title: The mass angular momentum inequality Abstract: We show that either there is a counterexample to black hole uniqueness, in the form of a regular axisymmetric stationary vacuum spacetime with an asymptotically flat end and multiple degenerate horizons which is ‘ADM stable’, or the following statement holds. […]