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Events happening on February 14, 2023

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Tue, Feb. 14 12:20pm (MATH …	Kempner Mandi Schaeffer Fry (Metropolitan State University of Denver) X Widely known as the founder of modular representation theory, Richard Brauer set the stage for the study of the so-called local-global conjectures in the character theory of finite groups. These are conjectures that relate the representations and structure of a finite group to that of certain proper (“local”) subgroups. In this talk, I'll discuss some of these conjectures and their implications for other character-theoretic properties and lingering questions of Brauer. Character Tables and Brauer’s Legacy
Tue, Feb. 14 1:25pm (Online)	Algebra/Logic Will Brian (University of North Carolina at Charlotte) View Online:https://cuboulder.zoom.us/j/96896272260 X I will sketch a proof that, assuming 0^† does not exist, if there is a partition of R into ℵ_ω Borel sets, then there is also a partition of R into ℵ_ω+1 Borel sets. (And the same is true for any singular cardinal of countable cofinality in place of ℵ_ω.) This contrasts starkly with the situation for cardinals with uncountable cofinality and their successors, where the spectrum of possible sizes of partitions of R into Borel sets can be made completely arbitrary via forcing. Partitions of the real line into Borel sets
Tue, Feb. 14 3:30pm (MATH 3…	Topology Agnes Beaudry, Robin Deeley and Markus Pflaum X In three 20 minute talks, each of us will introduce our research and what it is like to work in our research group. An Introduction to the CU Boulder Topology Group