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Events happening on December 1, 2015

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Dec. 01, 2015 10am (Math 350)	Jonathan Lamar (Colorado) X The set of all supercharacter theories of a finite group has a natural partial order, under which it forms a lattice. I will talk about some of the interactions between the algebra of the group and the combinatorics of the lattice. The Lattice of all Supercharacter Theories
Dec. 01, 2015 11am (Math 350)	Functional Analysis Palle Jorgensen (University of Iowa) X The talk will have two sides, one tilted towards applications, and the other representation theory. The applications are from symbolic dynamics, fractals, and computational harmonic analysis, e.g., discrete wavelet algorithms; both standard wavelets and wavelets on fractals. The representation theory part: The representations considered in the talk are representations of classes of certain non-abelian algebras (one in particular, the Cuntz algebra); and families of associated unitary representations of groups. We will show that a number of questions which arise naturally from the point of representation theory (equivalence classes of irreducibles, restriction, induction, decompositions etc) are at the same time key to solving questions in the applied areas mentioned. Atomic and non-atomic representations: algebras in analysis and in symbolic dynamics Sponsored by the Meyer Fund
Dec. 01, 2015 1pm (MATH 220)	Grad Algebra/Logic Jakub Bulin (CU Boulder) The Bounded Width Theorem, Part 3
Dec. 01, 2015 2pm (MATH 220)	Peter Mayr (CU) Generation and residual finiteness in products
Dec. 01, 2015 3pm (Math 350)	Algebraic Geometry Mattia Talpo (UBC) X I will talk about a comparison result between two objects that one can associate to a fine saturated log scheme over the complex numbers, namely the Kato-Nakayama space and the infinite root stack (joint work with D. Carchedi, S. Scherotzke and N. Sibilla). I will start by giving an introduction to log geometry through motivations and examples, then I will briefly introduce these two objects, that are different incarnations of the "log part" of the geometry of a log scheme. Towards the end I will state our result, and (time permitting) give an idea of what it boils down to. Kato-Nakayama spaces vs infinite root stacks Sponsored by the Meyer Fund

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