Venue: Aula Magna, Dipartimento di Matematica. Generalized matrix functions [3] are an extension of the notion of standard matrix functions to rectangular matrices, defined using the singular value decomposition instead of an eigenvalue…
Eventi
Seminario MAP – From PDE’s to Geometry: a new path towards the Minkowski Inequality – Luca Benatti (Università di Trento)
Title: From PDE’s to Geometry: a new path towards the Minkowski Inequality Abstract: The classical Minkowski inequality in Euclidean Spaces establishes a sharp lower bound for the total mean curvature of the boundary in terms of its area. This talk…
Archimedean height pairings for higher cycles – Gregory Pearlstein (Università di Pisa)
By the work of Richard Hain, the archimedean height pairing on ordinary algebraic cycles can be interpreted as an invariant of an associated mixed Hodge structure. In this talk, we will present a similar construction for higher cycles in the Bloch…
Ricci curvature, graphs and Coxeter groups – Viola Siconolfi (Università di Pisa, Italy)
I will talk about a notion of curvature for graphs introduced by Schmuckenschläger which is defined as an analogue of Ricci curvature. This quantity can be computed explicitly for various graphs and allows to find bounds on the spectral gap of the…
Young Researchers Meeting in Algebra and Geometry 2020
From Riemann surfaces to tropical curves (and back again) – Martin Ulirsch (Goethe University Frankfurt am Main)
The surprisingly deep analogy between compact Riemann surfaces and compact metric graphs lies at the heart of many recent developments in tropical geometry. In this talk I will give a short introduction to tropical geometry via this analogy focusing…
Surfaces with close to irrational Seshadri constants – Sönke Rollenske (Universität Marburg)
Seshadri constants measure local positivity of line bundles and it is an open question if they can be irrational on algebraic surfaces. I will recall this concept and prove that for a general point on a general hypersurface of degree $md$ in…
Workshop “Regularity Theory for Free Boundary and Geometric Variational Problems”
IHÉS Summer School “Enumerative Geometry, Physics and Representation Theory”
Expansions in the mixing local limit theorems for dynamical systems – Kasun Fernando (University of Toronto, Canada)
In this talk, we introduce higher-order expansions in the mixing local limit theorems for Birkhoff sums. We will discuss the general results under technical assumptions, and illustrate them by different examples (e.g. subshifts of finite type, Young…