### Conferences - Seminars

20NOV

10:15-11:15
CM 1 113

## Hochschild homology and the de Rham complex, revisited

I will describe a conceptual perspective on the story relating Hochschild homology and the algebraic de Rham complex in the setting of commutative rings. A bonus of this perspective is that it supplies a variant of the story in the setting of E-infinity algebras over the integers. The rough idea is as follows: by considering ...
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By Arpon Raksit

20NOV

15:00-16:00
PH H3 33

## Maximal subalgebras of modular Lie algebras

Groups, Arithmetic & Algebraic Geometry seminar
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By David Stewart, Newcastle

20NOV

16:15-17:15
MA A3 30

## Strongly Nonlinear Elastic Wave Propagation and the Essence of Spatial Invariance

Abstract: Wave motion lies at the heart of many disciplines in the physical sciences and engineering. For example, problems and applications involving light, sound, heat or fluid flow are all likely to involve wave dynamics at some level. In this seminar, I will present our recent work on a class of problems involving intriguing nonlinear ...
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By Prof. Mahmoud I. Hussein

23NOV

By Prof. Ass. Gilles Stupfler, University of Nottingham

23NOV

By Prof. Birgit

**Schorkhuber***-*Karlsruhe Institute of Technology - DE
27NOV

14:00-15:00
PH H3 33

## Reductions of non-lc-ideals and non-$F$-pure ideals assuming weak ordinarity

Abstract: It has been known for several decades that there are close connections between certain classes of singularities in the Minimal Model Program over $\mathbb{C}$ and so-called $F$-singularities which are defined in positive characteristic via Frobenius. There is a more refined conjecture which relates multiplier ideal filtrations and test ideal filtrations. The triviality of certain ...
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By Axel Stabler (Johannes Gutenberg Universität Mainz)

27NOV

16:15-17:30
MA B1 11

## Machine learning for dynamic incentive problems

Seminar of Numerical Analysis
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By Dr. Simon Scheidegger (UNIL, HEC Lausanne)

27NOV

17:15-18:15
CM 1 4

## A probabilistic approach to path integrals

Path integrals, which were introduced by Feynman in the context of quantum mechanics, can be seen as infinite dimensional analogues of integrals with respect to the standard Lebesgue measure. Roughly speaking, they correspond to summing all trajectories defined on an interval and taking values in a finite dimensional space. One can make sense of these ...
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By Prof. Vincent Vargas (ENS, Paris)

28NOV

13:00-14:00
MA B2 485

## The Steklov and Laplacian spectra of Riemannian manifolds with boundary

The Dirichlet-to-Neumann map is a first order pseudodifferential operator acting on the smooth functions of the boundary of a compact Riemannian manifold M. Its spectrum is known as the Steklov spectrum of M. The asymptotic behaviour (as j tends to infinity) of the Steklov eigenvalues s_j is determined by the Riemannian metric on the boundary ...
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By Alexandre Girouard, Professeur agrégé au Département de mathématiques et de ...

28NOV

14:30-15:30
MA B2 485

## Upper bounds for Courant-sharp Neumann eigenvalues

Let $\Omega$ be an open, bounded, connected set in $\R^n$, $n \geq 2$, with Lipschitz boundary. We consider the eigenvalues of the Neumann Laplacian acting in $L^2(\Omega)$. In particular, those that have a corresponding eigenfunction which achieves equality in Courant's Nodal Domain theorem. These eigenvalues are called Courant-sharp. It was shown recently by C. Léna ...
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By Katie Gittins, Maître-assistante à l'Institut de Mathématiques de l ...