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Statistics Seminar Speaker: Stanislav Volgushev, 03/29/2023

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Wednesday Mar 29 2023

Statistics Seminar Speaker: Stanislav Volgushev, 03/29/2023

4:15pm @ G01 Biotechnology
In Statistics Seminars

Stanislav is Associate Professor at the department of Statistical Sciences at the University of Toronto. Before joining Toronto, he was faculty at the Statistics department at Cornell and a visiting scholar at the University of Illinois at Urbana Champaign. He obtained his Phd in Mathematics from Ruhr University Bochum.

His research interests span a wide range of topics in mathematical Statistics, including empirical process theory, time series analysis, bootstrap and extreme value theory.

Talk: Structure learning for extremal graphical models

Abstract: Extremal graphical models are sparse statistical models for multivariate extreme events. The underlying graph encodes conditional independencies and enables a visual interpretation of the complex extremal dependence structure. In this talk we present a data-driven methodology to learn the underlying graph. For tree models and general extreme-value distributions, we show that the tree can be learned in a completely non-parametric fashion. For the specific class of Hüsler-Reiss distributions, we discuss methodologies for estimating general graphs. Conditions that ensure consistent graph recovery in growing dimensions are provided. 

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