Zurich colloquium in mathematics

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Datum / Zeit

Referent:in

Titel

Ort

22. September 2015
17:15-18:15

Prof. Dr. Martin Wainwright
Berkeley

Details

Titel	High-dimensional phenomena in convex analysis and mathematical statistics
Referent:in, Affiliation	Prof. Dr. Martin Wainwright, Berkeley
Datum, Zeit	22. September 2015, 17:15-18:15
Ort	KO2 F 150
Abstract	Statistical models in which the ambient dimension is of the same order or larger than the sample size arise frequently in different areas of science and engineering. Although high-dimensional models of this type date back to seminal work of Kolmogorov and others, they have been the subject of especially intensive study over the past decade, and have interesting connections to many branches of mathematics, including concentration of measure, convex analysis/geometry, and information theory. In this talk, we discuss various issues in high-dimensional statistics, including vignettes on phase transitions in high-dimensional graph recovery, and nonparametric density estimation with privacy constraints.

High-dimensional phenomena in convex analysis and mathematical statisticsread_more

13. Oktober 2015
17:15-18:15

Prof. Dr. Nalini Anatharaman
Université de Strasbourg

Details

Titel	Quantum ergodicity
Referent:in, Affiliation	Prof. Dr. Nalini Anatharaman, Université de Strasbourg
Datum, Zeit	13. Oktober 2015, 17:15-18:15
Ort	KO2 F 150
Abstract	"Quantum ergodicity'' usually deals with delocalization properties of eigenfunctions of the Laplacian on compact manifolds. After a review of the subject, I will discuss some recent work with Etienne Le Masson where we prove a "quantum ergodicity" result for eigenfunctions of the discrete Laplacian on large regular graphs. This means that, for most eigenfunctions $\psi_j$, the probability measure $\|\psi_j(x)\|^2$ on the vertices of the graph is close to uniform. I will also discuss possible extensions to other models.

Quantum ergodicityread_more

10. November 2015
17:15-18:15

Prof. Dr. Joseph Ayoub
Universität Zürich

Details

Titel	Symmetries in algebraic geometry and motives
Referent:in, Affiliation	Prof. Dr. Joseph Ayoub , Universität Zürich
Datum, Zeit	10. November 2015, 17:15-18:15
Ort	KO2 F 150

Symmetries in algebraic geometry and motives

8. Dezember 2015
17:15-18:15

Prof. Dr. Winfried Scharlau
Universität Münster

Details

Titel	Alexander Grothendieck -- the life of an outsider
Referent:in, Affiliation	Prof. Dr. Winfried Scharlau, Universität Münster
Datum, Zeit	8. Dezember 2015, 17:15-18:15
Ort	KO2 F 150

Alexander Grothendieck -- the life of an outsider

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