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Events for the weeks of March 29th – April 10th

Mon, Mar. 30 3pm (Kitt Cent…	DeLong Guoliang Yu (Texas AM University) View Online:https://cuboulder.zoom.us/j/97834671785 X Mathematicians use groups to capture the idea of symmetry, and manifolds to describe the shapes of spaces—from the surface of the Earth to models of the universe. In this talk, I will show how drawing and visualizing groups can reveal surprising information about the shape of a space. Through pictures, examples, and geometric intuition, we will see how symmetry can constrain and sometimes completely determine the global structure of a manifold. The talk is designed to be accessible to students and non-experts. Geometry of groups and topological rigidity of manifolds Sponsored by the Meyer Fund
Mon, Mar. 30 7pm (Remote (Z…	Functional Analysis Alonso Delfín (CU Boulder) View Online:97482826489 X Part III: Multiplier algebras Zoom ID: 97482826489 Mini-course L^p-operator algebras: Part III
Tue, Mar. 31 1:25pm (online)	Algebra/Logic Alex Nowak (Howard University) View Online:https://cuboulder.zoom.us/j/96896272260 X Drinfeld formulated the set-theoretic Yang Baxter equation (YBE) in an attempt to simplify the classification problem for solutions of the quantum YBE from physics. In the intervening 35 years, investigations of the set-theoretic YBE have called upon a wide array of algebraic structures: groups, quasigroups, racks, quandles, cycle sets, and (skew)-braces, just to name a few. In this talk, we will discuss how Bruck loops and Moufang loops are central to understanding a class of solutions that exhibit a ``dihedral" symmetry. This is joint work with Anna Zamojska-Dzienio. Dihedral solutions of the set theoretic Yang-Baxter equation
Tue, Mar. 31 7pm (MATH 350)	Functional Analysis Alonso Delfín (CU Boulder) View Online:97482826489 X Part IV: Catch up and L^p-Spectral Triples. Zoom ID: 97482826489 Mini-course L^p-operator algebras: Part IV
Wed, Apr. 1 2:10pm (MATH350)	Math Phys Evan Wickenden (CU Boulder Physics) Periodic Schrödinger operators and Bloch theory II
Wed, Apr. 1 3pm (Kitt Cent…	DeLong Guoliang Yu (Texas A&M University) View Online:https://cuboulder.zoom.us/j/97834671785 X Scalar curvature plays a fundamental role in geometry and in general relativity. Motivated by this connection, Misha Gromov proposed a striking rigidity conjecture: for a convex polyhedron, one cannot simultaneously increase the scalar curvature of a Riemannian metric and the mean curvature of its faces while decreasing the dihedral angles. This rigidity principle has deep consequences, including implications for the positive mass theorem in general relativity. In this talk, I will introduce Gromov’s conjecture and explain the ideas behind its proof using Dirac operators. This is joint work with Jinmin Wang and Zhizhang Xie. I will make an effort to keep the talk accessible to graduate students and non-experts. The Dirac operators and scalar curvature rigidity of manifolds Sponsored by the Meyer Fund
Thu, Apr. 2 1pm (MATH 350)	Algebraic Geometry Multiple speakers X Spring 2026 FRAG Day FRAG Day
Thu, Apr. 2 2:10pm (MATH220)	Math Phys Jorgen Ellegaard Andersen (University of Southern Denmark) X We will consider Geometric Quantization on general Kähler phase spaces and propose a program for compatible constructions of the quantization of functions, the Hilbert space structure, and the dependence on the choice of the Kähler structure (generalized Hitchin connection), fixing only the underlying symplectic manifold and a prequantum line bundle. We will in particular see explicitly how the curvature of the phase space modifies the quantization. Geometric Quantization of General Kähler Manifolds
Tue, Apr. 7 2:30pm (MATH 3…	Lie Theory J. Carlos Martínez Mori (University of Colorado Denver) TBD
Wed, Apr. 8 2:10pm (MATH 3…	Math Phys Scott Maccarone (CU Boulder) Kato's theorem on the selfadjointness of the molecular Hamiltonian
Thu, Apr. 9 1:30pm (MATH 3…	Topology Jean-Paul Brasselet (CNRS) Schwartz-MacPherson Classes
Fri, Apr. 10 9am (JILA Audi…	Math Phys Martin Schottenloher (TU Munich) X Joint with Topology Seminar and the CTQM TBA Sponsored by the Meyer Fund
Fri, Apr. 10 10:10am (JILA …	Math Phys Hessel Posthuma (University of Amsterdam) X Joint with Topology Seminar and the CTQM TBA Sponsored by the Meyer Fund
Fri, Apr. 10 11:10am (JILA …	Math Phys Marvin Qi (Kadanoff Center for Theoretical Physics) X Joint with Topology Seminar and the CTQM TBA Sponsored by the National Science Foundation
Fri, Apr. 10 11:40am (JILA …	Math Phys Shreya Arya (Pennsylvania State University) X Joint with Topology Seminar and the CTQM TBA Sponsored by the National Science Foundation
Fri, Apr. 10 12:20pm (Math …	Math Edu Rebecah Deans X A large part of mathematical maturity is being able to communicate a solution to a problem clearly, as well as being able to justify to a reader that the proposed solution is correct. Even so, good communication is generally not emphasized in high school and undergraduate mathematics instruction, leaving assessment of student comprehension largely up to the instructor's interpretation. In this talk, I will discuss how MATH 2400 has attempted to improve student communication on free response exam questions by introducing a communication component to free response rubrics. I will also discuss how we have attempted to prepare both students and instructors for this new aspect of assessment. Improving and Assessing Student Communication in Coordinated Courses
Fri, Apr. 10 12:30pm (JILA …	Math Phys Anton Kapustin (California Institute of Technology) X Joint with Topology Seminar and the CTQM TBA
Fri, Apr. 10 2:10pm (JILA …	Math Phys David Jonas (CU Boulder) X Joint with Topology Seminar and the CTQM TBA
Fri, Apr. 10 3:35pm (DUANE …	Math Phys Daniel Spiegel (Harvard Center of Mathematical Sciences and Applications) X Joint with Topology Seminar and the CTQM TBA Sponsored by the Meyer Fund
Fri, Apr. 10 4:40pm (DUANE …	Math Phys Xiang Tang (Washington St Louis) X Joint with Topology Seminar and the CTQM TBA Sponsored by the Meyer Fund

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