Departement Mathematik

Zurich colloquium in mathematics

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Herbstsemester 2011

Datum / Zeit Referent:in Titel Ort
* 20. September 2011
17:15-18:15 		Prof. Dr. Emmanuel Candes
Stanford University, USA
Details

Zurich Colloquium in Mathematics

Titel Robust Principal Component Analysis? Some Theory and Some Applications
Referent:in, Affiliation Prof. Dr. Emmanuel Candes, Stanford University, USA
Datum, Zeit 20. September 2011, 17:15-18:15
Ort HG F 3
Abstract This talk is about a curious phenomenon. Suppose we have a data matrix, which is the superposition of a low-rank component and a sparse component. Can we recover each component individually? We prove that under some suitable assumptions, it is possible to recover both the low-rank and the sparse components exactly by solving a very convenient convex program. This suggests the possibility of a principled approach to robust principal component analysis since our methodology and results assert that one can recover the principal components of a data matrix even though a positive fraction of its entries are arbitrarily corrupted. This extends to the situation where a fraction of the entries are missing as well. In the second part of the talk, we present applications in computer vision. In video surveillance, for example, our methodology allows for the detection of objects in a cluttered background. We show how the methodology can be adapted to simultaneously align a batch of images and correct serious defects/corruptions in each image, opening new perspectives. Joint work with X. Li, Y. Ma and J. Wright.
Robust Principal Component Analysis? Some Theory and Some Applicationsread_more
HG F 3
11. Oktober 2011
17:15-18:15 		Prof. Dr. Artur Avila
Instituto Nacional de Matemática Pura e Aplicada, Brasil
Details

Zurich Colloquium in Mathematics

Titel Global Theory of One-Frequency Schrödinger Operators
Referent:in, Affiliation Prof. Dr. Artur Avila, Instituto Nacional de Matemática Pura e Aplicada, Brasil
Datum, Zeit 11. Oktober 2011, 17:15-18:15
Ort KO2 F 150
Global Theory of One-Frequency Schrödinger Operators
KO2 F 150
1. November 2011
17:15-18:15 		Prof. Dr. Francis Brown
Institut de Mathématiques de Jussieu, France
Details

Zurich Colloquium in Mathematics

Titel Multiple Zeta Values in Algebraic Geometry and Physics
Referent:in, Affiliation Prof. Dr. Francis Brown, Institut de Mathématiques de Jussieu, France
Datum, Zeit 1. November 2011, 17:15-18:15
Ort KO2 F 150
Multiple Zeta Values in Algebraic Geometry and Physics
KO2 F 150
22. November 2011
17:15-18:15 		Prof. Dr. Manfred Einsiedler
ETH Zurich, Switzerland
Details

Zurich Colloquium in Mathematics

Titel Periodic Orbits on Homogeneous Spaces
Referent:in, Affiliation Prof. Dr. Manfred Einsiedler, ETH Zurich, Switzerland
Datum, Zeit 22. November 2011, 17:15-18:15
Ort KO2 F 150
Periodic Orbits on Homogeneous Spaces
KO2 F 150
6. Dezember 2011
17:15-18:15 		Prof. Dr. Hans Föllmer
Humboldt Universität zu Berlin, Germany
Details

Zurich Colloquium in Mathematics

Titel Risk and Uncertainty: On the Role of Probability in Finance
Referent:in, Affiliation Prof. Dr. Hans Föllmer, Humboldt Universität zu Berlin, Germany
Datum, Zeit 6. Dezember 2011, 17:15-18:15
Ort KO2 F 150
Risk and Uncertainty: On the Role of Probability in Finance
KO2 F 150

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