[Statlist] Statistics $eminar, Friday 29 May at 16h00

[Schaffner Portillo Maroussia]

STATISTICS SEMINAR



Friday 29 May, 2020 - 16h00



zoom meeting<https://epfl.zoom.us/j/92561243688>



Prof. Yulia R. Gel<https://personal.utdallas.edu/~yxg142030/>

University of Dallas at Texas



will be speaking on :



On the Role of Higher Order Topological Properties in Functionality of Complex Networks



Abstract:



The emerging machinery of topological data analysis and, particularly, persistent homology allow to unveil some critical characteristics behind organization of complex networks and interactions of their components at multi-scale levels, which are otherwise largely inaccessible with conventional analytical approaches.

The ultimate idea is to study properties of progressively finer simplical complexes on graphs over a range of (dis)similarity thresholds and then to assess which topological characteristics exhibit a longer lifespan (or persist) across multiple (dis)similarity thresholds. Such persistent features are likelier to be related to intrinsic network organization and functionality.

In turn, features with shorter lifespan can be referred to as topological noise. In this talk we discuss how geometry and topology of blockchain transaction networks, assessed with the machinery of persistent homology, can enhance our understanding of hidden mechanisms behind blockchain graph anomalies and associated crypto price dynamics.



Bio:
Yulia R. Gel is Professor in the Department of Mathematical Science at the University of Texas at Dallas. Her research interests include statistical foundation of data science, topological and geometric methods in statistics, applied topological data analysis, complex networks, and spatio-temporal modeling. She received her Ph.D in Mathematics from Saint Petersburg State University, Russia, followed by a postdoctoral position in Statistics at the University of Washington.  Prior to joining UT Dallas, she was a faculty member at the University of Waterloo, Canada. She also held visiting positions at Johns Hopkins University, University of California, Berkeley, and JPL, NASA/Caltech. Yulia is a Fellow of the American Statistical Association (ASA) and is a recipient of the Abdel El-Shaarawi Young Researcher's TIES Award for outstanding contributions to the field of environmental statistics and the ASA Statistics and the Environment Distinguished Achievement Medal.



Best wishes.


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PS : past zoom seminars can be found here: https://tube.switch.ch/channels/1ff05a6b

  *   David Madigan, 24 April 2020, "Towards honest inference from real-world healthcare data "
  *   Ernst Wit, 8 May 2020, "COVID-19 and the perils of inferring epidemiological parameters from clinical data"
  *   Michael Wolf, 15 Mays, "Shrinkage Estimation of Large Covariance Matrices: Keep It Simple, Statistician?"

Maroussia Schaffner
EPFL SB SMAT
Station 8
CH-1015 Lausanne


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