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Colloquia & Seminars

The Department of Mathematics & Statistics colloquium speakers give 50-minute presentations on various mathematical and statistical topics. Colloquia are schedule from 2:30pm - 3:30pm unless otherwise noted.

If you would like to meet with a speaker, please contact math@unr.edu to schedule a meeting. We look forward to your participation in our upcoming colloquia! 

DateSpeakerInstitutionTitleRoomHost
Sep 29 Paul Hurtado UNR Biological Dynamics: Research at the Interface of Biology, Statistics & Mathematics.
Abstract...

The now decades-old explosion in computing power has fueled a "quantitative revolution" in the biological sciences. Mathematics and statistics has played a big role in that revolution, and today more than ever before these disciplines are at the forefront of many critically important issues, including antibiotic resistance, cancer treatment and prevention, other areas of medicine, public and environmental health, agriculture, biodiversity, and human behavior. This synergy has lead to clear benefits to biology writ large, but has also lead to new mathematical and statistical challenges. In this talk, I will present an overview of some research projects, focusing primarily on two topics: First, the application of PDE models to investigate how multiple biological trade-offs drive the spatiotemporal evolution of pathogen virulence in a wildlife disease system. Second, I will introduce examples of using ODEs to model specific biological systems, discuss why we want to use those models as statistical models, and some of challenges of attempting to do so (e.g., the challenges of fitting ODE models to data, and evaluating those results). This talk is intended to be accessible to undergraduates as well as faculty.

AB 635
Oct 6 Vit Dolejší Charles University, Prague, Czech Republic TBA
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TBA

Oct 13 Vincent Martinez Tulane University TBA
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Oct 20 He Wang UNR Formality properties in topology and group theory.
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Formality is a topological property that arises from the rational homotopy theory developed by Quillen and Sullivan in 70’s. Roughly speaking, the rational homotopy type of a formal space is determined by its cohomology algebra. A closely related property of a finitely generated group is 1-formality, which allows one to reconstruct the rational pro-unipotent completion of the group solely from the cup products of degree 1 cohomology classes. In this talk, we will separate 1-formality into two complementary properties: graded formality and filtered formality, by studying various Lie algebras over a field of characteristic 0 attached to such group, including the associated graded Lie algebra, the holonomy Lie algebra, and the Malcev Lie algebra. We explain how these notions behave with respect to split injections, coproducts, direct products, as well as field extensions. We illustrate our approach with examples drawn from a variety of group-theoretic and topological contexts, such as 1-relator groups, finitely generated torsion-free nilpotent groups, link groups, fundamental groups of Seifert fibered manifolds, and pure virtual braid groups. If time permits, we will introduce another approach to formality properties (proposed by Dror Bar-Natan) provided by Taylor expansions from the group to the completion of the associated graded algebra of the group ring. This talk is about joint work with Alex Suciu.

Oct 27 Emine Celik UNR TBA
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Nov 3 TBA TBA TBA
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Nov 10 TBA TBA TBA
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Nov 17 TBA TBA TBA
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Dec 1 TBA TBA TBA
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Dec 8 TBA TBA TBA
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