Difference between revisions of "Probability Seminar"

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(Thursday, January 29, Arnab Sen, University of Minnesota)
(Thursday, March 26, Elnur Emrah, UW-Madison)
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== Thursday, March 26, [http://www.math.wisc.edu/~emrah/ Elnur Emrah], [http://www.math.wisc.edu/ UW-Madison]  ==
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== Thursday, March 26, [http://mathsci.kaist.ac.kr/~jioon/ Ji Oon Lee], [http://www.kaist.edu/html/en/index.html KAIST]  ==
  
 
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== Thursday, April 9, [http://www.math.wisc.edu/~emrah/ Elnur Emrah], [http://www.math.wisc.edu/ UW-Madison]  ==
  
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Revision as of 15:26, 28 January 2015


Spring 2015

Thursdays in 901 Van Vleck Hall at 2:25 PM, unless otherwise noted.

If you would like to sign up for the email list to receive seminar announcements then please send an email to join-probsem@lists.wisc.edu.

Thursday, January 15, Miklos Racz, UC-Berkeley Stats

Title: Testing for high-dimensional geometry in random graphs

Abstract: I will talk about a random geometric graph model, where connections between vertices depend on distances between latent d-dimensional labels; we are particularly interested in the high-dimensional case when d is large. Upon observing a graph, we want to tell if it was generated from this geometric model, or from an Erdos-Renyi random graph. We show that there exists a computationally efficient procedure to do this which is almost optimal (in an information-theoretic sense). The key insight is based on a new statistic which we call "signed triangles". To prove optimality we use a bound on the total variation distance between Wishart matrices and the Gaussian Orthogonal Ensemble. This is joint work with Sebastien Bubeck, Jian Ding, and Ronen Eldan.

Thursday, January 22, No Seminar

Thursday, January 29, Arnab Sen, University of Minnesota

Title: Double Roots of Random Littlewood Polynomials

Abstract: We consider random polynomials whose coefficients are independent and uniform on {-1,1}. We will show that the probability that such a polynomial of degree n has a double root is o(n^{-2}) when n+1 is not divisible by 4 and is of the order n^{-2} otherwise. We will also discuss extensions to random polynomials with more general coefficient distributions.

This is joint work with Ron Peled and Ofer Zeitouni.

Thursday, February 5, TBA

Title: TBA

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Thursday, February 12, TBA

Title: TBA

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Thursday, February 19, Xiaoqin Guo, Purdue

Title: TBA

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Thursday, February 26, Dan Crisan, Imperial College London

Title: TBA

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Thursday, March 5, TBA

Title: TBA

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Thursday, March 12, TBA

Title: TBA

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Thursday, March 19, TBA

Title: TBA

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Thursday, March 26, Ji Oon Lee, KAIST

Title: TBA

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Thursday, April 9, Elnur Emrah, UW-Madison

Title: TBA

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Past Seminars