Search

Algebraic Geometry Algebra/Logic DeLong Diversity Functional Analysis Grad Algebra/Logic Homotopy Init Conditions Kempner Lie Theory Math Club Math Phys Noncomm Geometry Number Theory PDE/Analysis Probability Rep Theory Grad Student Seminar Thesis Defenses Topology Ulam Math Edu

Events happening on December 11, 2018

Return to this week

Print these events

Dec. 11, 2018 10am (Math 350)	PDE/Analysis Taylor Klotz (CU Boulder) X Given a nonlinear control system with symmetry one might want to ask if there is a related system that is linearizable and whose solutions can be used to construct solutions to the original nonlinear system. One ad hoc technique is to attempt to add additional differential equations to the system and hope for a new linearizable system. This is currently known as Dynamic Feedback Linearization. In a different direction, if we assume the nonlinear system has symmetries then one can form a smaller system via a quotient by the symmetries. If this system is linearizable then its solutions can be used to construct solutions to the original system. This talk will explore recent work on the connection between these two solution methods and how the latter sheds light on a potential theory of the former. Cascade Linearization and Dynamic Feedback Linearization of Control Systems with Symmetry
Dec. 11, 2018 11am (MATH 350)	Number Theory Dan Stroock (MIT and CU) Continued Fractions and Pell's Equation
Dec. 11, 2018 12:10pm (MATH …	Kempner Florian Pfender (CU Denver) X The flag algebra method is a technique recently developed by Razborov, and it has revolutionized parts of extremal combinatorics. The method draws from the theory of graph limits, analysis, probability and optimization. We will quickly present the fundamental ideas and then show a number of diverse applications. Somewhat counter intuitively, one can even use it to show statements about relatively small graphs, and we will show how it can be used to find new bounds on graph Ramsey numbers. joint work with B. Lidicky Semidefinite programming in extremal graph theory -- advances on the flag algebra method
Dec. 11, 2018 1pm (MATH 220)	Grad Algebra/Logic Peter Mayr CSP linear quotients 3
Dec. 11, 2018 2pm (MATH 220)	Trevor Jack (CU Boulder) X Given generators for finite transformation semigroups and finite matrix semigroups, we will give explicit polynomial time algorithms for finding all of the left and right identities for the generated semigroups. Computing Left and Right Identities in a Semigroup

Return to the top of the page