Colloquia, Seminars, and Conferences


Friday, November 17th, 2017 at 2pm, NS 333
"Censored quantile regression in high dimensional survival data"
Qi Zheng
Department of Bioinformatics and Biostatistics, University of Louisville

Abstract: Censored quantile regression (CQR) has emerged as a useful regression tool for survival analysis. Stochastic integral based estimating equations are commonly used in the estimation of CQR, and pose new challenges in the analysis of CQR for high dimensional survival data. In this work, we study the high dimensional CQR simultaneously over a continuum of quantile indices. We propose a two-step penalization procedure, which accommodates stochastic integral based estimating equations and properly addresses the associated complications. We establish the uniform convergence rates for the proposed estimators, and investigate the properties on weak convergence and variable selection. We conduct extensive numerical studies to confirm our theoretical findings and illustrate the practical utility of our proposals.

Key words: High dimensional data; Varying covariate effects; Model selection; Adaptive penalized quantile regression.

Colloquium Series Information

The mathematics department holds regular department colloquia.  For more information please contact:

Dr. Bingtuan Li or

Some Past Mathematics Department Colloquia


The following research seminars meet reguraly in the Natural Sciences Building. Everyone is welcome to attend. For more information, please contact corresponding coordinators.

Analysis Seminar

Contact: Dr. Alica Miller

Algebra & Combinatorics Seminar


past Algebra and Combinatorics seminars

Differential Equations and Applied Math Seminar 


Graduate Student Seminar


Mathematical Biology Seminar

Contact: Dr. Bingtuan Li

Probability & Statistics Seminar



The mathematics department has hosted several mathematics conferences.  Here are links to some of the recent past conferences:

24th Cumberland Conference on Combinatorics, Graph Theory, and Computing, May 12-14, 2011

Fall Southeastern Sectional Meeting of the American Mathematical Society, October 5-6, 2013

Institutional Accreditation:

The University of Louisville is accredited by the Commission on Colleges of the Southern Association of Colleges and Schools to award associate, bachelor, master, specialist, doctoral, and first-professional degrees (D.M.D., J.D., M.D.). Individuals who wish to contact the Commission on Colleges regarding the accreditation status of the university may write the Commission at 1866 Southern Lane, Decatur, Georgia 30033-4097, or call (404) 679-4500. See Accreditation Confirmation Letter for more Information.

University of Louisville, Department of Mathematics.
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