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DTSTART;TZID=America/Chicago:20260416T190000
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DTSTAMP:20260606T220757
CREATED:20260407T184219Z
LAST-MODIFIED:20260407T184219Z
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SUMMARY:Climate Change: Science and Faith Perspectives
DESCRIPTION:Bart Adrian\, Senior Lecturer in Atmospheric Science and Mathematics\, will be speaking on the topic Climate Change: Science and Faith Perspectives. \nBart will be presenting at the meeting of the Greater Milwaukee Chapter of the American Meteorological Society on Thursday\, April 16\, starting at 7:00pm in EMS E180 on the UWM campus. \nThis event is free and open to the public.
URL:https://uwm.edu/letters-science/event/climate-change-science-and-faith-perspectives/
LOCATION:UWM EMS Building\, Room 180\, 3200 N. Cramer Street\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Lectures Conferences and Symposiums,Natural Sciences,Public,UWM Campus Events
ATTACH;FMTTYPE=image/webp:https://uwm.edu/letters-science/wp-content/uploads/sites/255/2026/04/adrianb.webp
ORGANIZER;CN="Mathematical Sciences Department":MAILTO:math-staff@uwm.edu
X-TRIBE-STATUS:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20260409T163000
DTEND;TZID=America/Chicago:20260409T173000
DTSTAMP:20260606T220757
CREATED:20260309T145406Z
LAST-MODIFIED:20260326T164141Z
UID:10017576-1775752200-1775755800@uwm.edu
SUMMARY:Marden Lecture Series Presents: Juggling Counts
DESCRIPTION:Presented by Prof. Steve Butler\, Morrill\, Professor of Mathematics at Iowa State University \nMathematics is a language which can help us describe and explore patterns. One source of patterns that mathematicians have been exploring comes from juggling (the tossing of objects\, usually balls or clubs). We will look at multiple ways to describe juggling patterns that allow us to find new juggling patterns\, and to count how many possible patterns exist. We can compare answers to various problems to give a combinatorial proof of Worpitzky’s identity. We will also look at a few juggling-based problems that mathematics has not yet succeeded in answering. \nThis event is a part of the Marden Lecture Series\, each Spring the Department of Mathematical Sciences invites a distinguished mathematician to lecture to a general audience. The Marden Lecture honors Morris Marden (1905 – 1991)\, who founded our graduate program and made our department a research department. The Marden lecture is funded through the Miriam and Morris Marden Fund and is co-sponsored by the Department of Mathematical Sciences.
URL:https://uwm.edu/letters-science/event/marden-lecture-series-presents-juggling-counts/
LOCATION:UWM Lubar Hall\, Room N140\, 3202 N. Maryland Ave.\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Alumni & Community,Lectures Conferences and Symposiums,Natural Sciences,Public,Students,UWM Campus Events
ATTACH;FMTTYPE=image/webp:https://uwm.edu/letters-science/wp-content/uploads/sites/255/2026/03/marden_calender_720x480px.webp
ORGANIZER;CN="Mathematical Sciences Department":MAILTO:math-staff@uwm.edu
X-TRIBE-STATUS:
GEO:43.0761608;-87.8822351
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20250124T140000
DTEND;TZID=America/Chicago:20250124T150000
DTSTAMP:20260606T220757
CREATED:20250115T155712Z
LAST-MODIFIED:20250115T155712Z
UID:10015867-1737727200-1737730800@uwm.edu
SUMMARY:Studying Successful Doctoral Students from Underrepresented Groups
DESCRIPTION:In this talk\, we will share early findings from an NSF study of 75 doctoral students and recent PhDs in mathematics from underrepresented groups. The project has conducted in-depth\, semi-structured interviews with four cohorts: newly accepted students\, early graduate students (pre-qualifying exams)\, advanced graduate students (dissertation level)\, and recent PhDs (0-5 years since graduation). The research questions in the study are: \nWhat are lived experiences of successful underrepresented students who are pursuing mathematics PhDs?\nWhat formal and informal structures are perceived by doctoral students as effective supports? \nThemes drawn from the interviews can inform department policies and practices to create environments that support students from underrepresented groups as they earn PhDs in mathematics. \nPresented by Dr. Sarah Sword\nPrincipal Research Scientist\nEducation Development Center\, Inc.
URL:https://uwm.edu/letters-science/event/studying-successful-doctoral-students-from-underrepresented-groups/
LOCATION:UWM EMS Building\, Room E495\, 3200 N. Cramer Avenue\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Lectures Conferences and Symposiums,UWM Campus Events
ATTACH;FMTTYPE=image/webp:https://uwm.edu/letters-science/wp-content/uploads/sites/255/2024/02/math.webp
ORGANIZER;CN="Mathematical Sciences Department":MAILTO:math-staff@uwm.edu
X-TRIBE-STATUS:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20241018T140000
DTEND;TZID=America/Chicago:20241018T150000
DTSTAMP:20260606T220757
CREATED:20241008T193834Z
LAST-MODIFIED:20241008T193834Z
UID:10015818-1729260000-1729263600@uwm.edu
SUMMARY:Math Colloquium: Long-Time Behaviors of Stochastic Linear-Quadratic Optimal Control Problems
DESCRIPTION:Presented by Prof. Qingshuo Song\, associate professor at Worcester Polytechnic Institute.  \nIn this talk\, we will discuss the asymptotic behavior of the solution to a linear-quadratic stochastic optimal control problems. By establishing a connection between the ergodic cost problem and the so-called cell problem in the homogenization of Hamilton-Jacobi equations\, we reveal the turnpike properties of the linear-quadratic stochastic optimal control problems from various perspectives. \nA reception follows the presentation.
URL:https://uwm.edu/letters-science/event/math-colloquium-long-time-behaviors-of-stochastic-linear-quadratic-optimal-control-problems/
LOCATION:UWM EMS Building\, Room E495\, 3200 N. Cramer Avenue\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Lectures Conferences and Symposiums,UWM Campus Events
ATTACH;FMTTYPE=image/webp:https://uwm.edu/letters-science/wp-content/uploads/sites/255/2024/02/math.webp
ORGANIZER;CN="Mathematical Sciences Department":MAILTO:math-staff@uwm.edu
X-TRIBE-STATUS:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20241011T140000
DTEND;TZID=America/Chicago:20241011T153000
DTSTAMP:20260606T220757
CREATED:20241001T145027Z
LAST-MODIFIED:20241001T145027Z
UID:10015789-1728655200-1728660600@uwm.edu
SUMMARY:Math Colloquium: Baby Mandelbrot Sets for Maximally Generalized McMullen Maps
DESCRIPTION:Presented by Dr. Daniel Stoertz\, Visiting Assistant Professor of Mathematics at St. Olaf College. \nIn Complex Dynamics\, we study the iteration of holomorphic or meromorphic functions on the complex plane or the Riemann sphere. Of particular interest is the behavior of the critical orbits of function families with one or more parameters. The simplest of such families\, z^2 +c\, is well-known to define the famous Mandelbrot set fractal as the set of c-values for which the unique critical orbit is bounded. In this talk we will examine the function family R(z) = z^n +b +a/(z^d)\, and we will explore old and new results establishing the location of baby Mandelbrot sets in parameter space for increasingly general versions of this family. In the most general case\, which we call maximally generalized McMullen maps\, this family has multiple independent critical orbits\, and the dynamics in this case are not yet well understood.
URL:https://uwm.edu/letters-science/event/math-colloquium-baby-mandelbrot-sets-for-maximally-generalized-mcmullen-maps/
LOCATION:UWM EMS Building\, Room E495\, 3200 N. Cramer Avenue\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Lectures Conferences and Symposiums,UWM Campus Events
ATTACH;FMTTYPE=image/webp:https://uwm.edu/letters-science/wp-content/uploads/sites/255/2024/02/math.webp
ORGANIZER;CN="Mathematical Sciences Department":MAILTO:math-staff@uwm.edu
X-TRIBE-STATUS:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20241004T140000
DTEND;TZID=America/Chicago:20241004T150000
DTSTAMP:20260606T220757
CREATED:20240925T154751Z
LAST-MODIFIED:20240925T154751Z
UID:10015788-1728050400-1728054000@uwm.edu
SUMMARY:Math Colloquium: Parabolic System of Aggregation Formation in Bacterial Colonies
DESCRIPTION:The goal of this talk is to study a fourth-order nonlinear parabolic system with dispersion for describing bacterial aggregation. Analytical solution of traveling wave is found by taking into account the dispersion coefficient. Numerically\, we demonstrate that the initial concentration of bacteria in the form of a random distribution over time transforms into a periodic wave\, followed by a transition to a stationary solitary wave without dispersion. \nPresented by Dr. Zhaosheng Feng\, Endowed Chair Professor of Mathematics\, University of Texas Rio Grande Valley.
URL:https://uwm.edu/letters-science/event/math-colloquium-parabolic-system-of-aggregation-formation-in-bacterial-colonies/
LOCATION:UWM EMS Building\, Room E495\, 3200 N. Cramer Avenue\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Lectures Conferences and Symposiums,UWM Campus Events
ATTACH;FMTTYPE=image/webp:https://uwm.edu/letters-science/wp-content/uploads/sites/255/2024/02/math.webp
ORGANIZER;CN="Mathematical Sciences Department":MAILTO:math-staff@uwm.edu
X-TRIBE-STATUS:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20240421T080000
DTEND;TZID=America/Chicago:20240421T170000
DTSTAMP:20260606T220757
CREATED:20240217T175452Z
LAST-MODIFIED:20240217T175452Z
UID:10014385-1713686400-1713718800@uwm.edu
SUMMARY:American Mathematical Society Spring Central Sectional Meeting
DESCRIPTION:Sectional meeting of the American Mathematical Society hosted by UWM’s Department of Mathematical Sciences. See https://www.ams.org/meetings/sectional/2318_program.html for program agenda\, registration and details.
URL:https://uwm.edu/letters-science/event/american-mathematical-society-spring-central-sectional-meeting/2024-04-21/
CATEGORIES:Lectures Conferences and Symposiums,UWM Campus Events
ATTACH;FMTTYPE=image/webp:https://uwm.edu/letters-science/wp-content/uploads/sites/255/2024/02/math.webp
ORGANIZER;CN="Mathematical Sciences Department":MAILTO:math-staff@uwm.edu
X-TRIBE-STATUS:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20240403T163000
DTEND;TZID=America/Chicago:20240403T173000
DTSTAMP:20260606T220757
CREATED:20240311T192922Z
LAST-MODIFIED:20240327T174202Z
UID:10014481-1712161800-1712165400@uwm.edu
SUMMARY:Marden Lecture in Math: The intrigue that compels us
DESCRIPTION:When we witness unexpected phenomena\, a mathematician finds themselves asking: why? We are compelled to understand further; what is the cause\, the basic underlying principles? Mathematics is full of symmetries\, patterns and visuals that we can appreciate in their own right or use to explain and illustrate concepts. And\, they can also drive us to discovery. I will tell a story of chip-firing\, a mathematical idea that leads to fascinatingly intricate structures. The imagery of these structures has spurred many questions to which we know surprisingly few answers. \nPresented by Professor Caroline Klivans\, Brown University. \nA reception follows the lecture in EMS E495. \nThe Marden lecture\, along with Marden scholarships\, is supported by the Marden family. Dr. Morris Marden (1905-1991) was a Distinguished Professor Emeritus of Mathematics and is generally considered to have been the founder of the Mathematics Department at UWM as a research department\, and he is the person most responsible for the beginning of graduate programs at UWM.
URL:https://uwm.edu/letters-science/event/marden-lecture-in-math-the-intrigue-that-compels-us/
LOCATION:UWM Lubar Hall\, Room N140\, 3202 N. Maryland Ave.\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Lectures Conferences and Symposiums,UWM Campus Events
ORGANIZER;CN="Mathematical Sciences Department":MAILTO:math-staff@uwm.edu
X-TRIBE-STATUS:
GEO:43.0761608;-87.8822351
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=UWM Lubar Hall Room N140 3202 N. Maryland Ave. Milwaukee WI 53211 United States;X-APPLE-RADIUS=500;X-TITLE=3202 N. Maryland Ave.:geo:-87.8822351,43.0761608
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20240301T140000
DTEND;TZID=America/Chicago:20240301T153000
DTSTAMP:20260606T220757
CREATED:20240213T201524Z
LAST-MODIFIED:20240213T201524Z
UID:10014380-1709301600-1709307000@uwm.edu
SUMMARY:Combinatorial Resolutions of Monomial Ideals
DESCRIPTION:Department of Mathematical Sciences Colloquium presented by Dr. Selvi Kara\, Bryn Mawr College. \nOne of the central problems in commutative algebra concerns understanding the structure of an ideal in a polynomial ring. Abstractly\, an ideal’s structure can be expressed through an object called its minimal resolution\, but there is no explicit method to obtain a minimal resolution in general\, even for the simpler and fundamental class known as monomial ideals. \nIn this talk\, we will focus on resolutions of monomial ideals. In particular\, I will introduce a new combinatorial method that provides a resolution of any monomial ideal using tools from discrete Morse theory.
URL:https://uwm.edu/letters-science/event/combinatorial-resolutions-of-monomial-ideals/
LOCATION:UWM EMS Building\, Room E495\, 3200 N. Cramer Avenue\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Lectures Conferences and Symposiums,UWM Campus Events
ATTACH;FMTTYPE=image/webp:https://uwm.edu/letters-science/wp-content/uploads/sites/255/2024/02/math.webp
ORGANIZER;CN="Mathematical Sciences Department":MAILTO:math-staff@uwm.edu
X-TRIBE-STATUS:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20240223T140000
DTEND;TZID=America/Chicago:20240223T153000
DTSTAMP:20260606T220757
CREATED:20240213T201317Z
LAST-MODIFIED:20240213T201317Z
UID:10014379-1708696800-1708702200@uwm.edu
SUMMARY:Encouraging Student Interest in STEM in Elementary\, Middle and High School Classrooms
DESCRIPTION:Department of Mathematical Sciences Colloquium presented by Bart Adrian\, UWM. \nAtmospheric science provides excellent opportunities for encouraging student interest in all fields of STEM (Science\, Technology\, Engineering\, Math). A model outreach program (“Chasing the Wind: Tools for Understanding the Weather”) will be presented for use in elementary\, middle and high school classrooms. Key elements of the presentation will be highlighted: sharing of personal career background; storytelling about scientists and scientific concepts; utilization of physical props and humor; messaging on the importance of fluency in mathematics\, the language of STEM; and direct involvement of the audience.
URL:https://uwm.edu/letters-science/event/encouraging-student-interest-in-stem-in-elementary-middle-and-high-school-classrooms/
LOCATION:UWM EMS Building\, Room E495\, 3200 N. Cramer Avenue\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Lectures Conferences and Symposiums,UWM Campus Events
ATTACH;FMTTYPE=image/webp:https://uwm.edu/letters-science/wp-content/uploads/sites/255/2024/02/math.webp
ORGANIZER;CN="Mathematical Sciences Department":MAILTO:math-staff@uwm.edu
X-TRIBE-STATUS:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20240216T140000
DTEND;TZID=America/Chicago:20240216T153000
DTSTAMP:20260606T220757
CREATED:20240213T200813Z
LAST-MODIFIED:20240213T201113Z
UID:10014377-1708092000-1708097400@uwm.edu
SUMMARY:Elementary matrix operations on a napkin
DESCRIPTION:Department of Mathematical Sciences Colloquium presented by Dr. Bogdan Nica\, Indiana University-Purdue University Indianapolis. \nMatrices of determinant 1 can be reduced to the identity matrix by row- and column-operations. This is a well-known fact of linear algebra–assuming that we work with real or complex entries. A closer look reveals that the number of elementary operations needed to reduce an n-by-n matrix can be estimated as a function of n\, independently of the matrix! (Can you find such a function?) This is a phenomenon of `bounded elementary reduction’ or\, to put it differently\, of `bounded elementary generation’. \nIt is easy to ask\, but hard to answer\, whether an analogous `bounded elementary generation’ holds for matrices with integral entries (meaning that the allowed elementary operations have to be integral as well). This is now a group-theoretic question with a strong number-theoretic flavor; we have definitely left Kansas. The main goal of my talk is to give a friendly overview of `bounded elementary generation’ over the integers\, and survey its status for other rings of arithmetic nature. \nBounded elementary generation has been linked with algebraic K-theory\, Kazhdan’s property (T)\, representation rigidity\, the congruence subgroup property\, and bounded cohomology. Time permitting\, I will touch on the latter.
URL:https://uwm.edu/letters-science/event/elementary-matrix-operations-on-a-napkin/
LOCATION:UWM EMS Building\, Room E495\, 3200 N. Cramer Avenue\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Lectures Conferences and Symposiums,UWM Campus Events
ATTACH;FMTTYPE=image/webp:https://uwm.edu/letters-science/wp-content/uploads/sites/255/2024/02/math.webp
ORGANIZER;CN="Mathematical Sciences Department":MAILTO:math-staff@uwm.edu
X-TRIBE-STATUS:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20230428T153000
DTEND;TZID=America/Chicago:20230428T163000
DTSTAMP:20260606T220757
CREATED:20230411T195941Z
LAST-MODIFIED:20230412T154235Z
UID:10014114-1682695800-1682699400@uwm.edu
SUMMARY:The Painlevé Equations Through The Lens Of Algebra: 120 Years Later
DESCRIPTION:The annual Marden Lecture in Math is presented by Dr. Joel Nagloo\, Associate Professor of Mathematics at the University of Illinois\, Chicago. \nThe Painlevé equations are second order ordinary differential equations that come in six families P1 – P6. They were discovered strictly for mathematical considerations\, in the early part of the 20th century\, by mathematicians Paul Painlevé\, Bertrand Gambier and Richard Fuchs. Nevertheless\, these equations have arisen in a variety of important physical applications including for example statistical mechanics\, random matrix theory\, general relativity and fibre optics. In this talk\, I will start by giving an overview of the history of the Painlevé equations and describing the classical questions surrounding the transcendental nature of their solutions. I will then explain how\, in recent years\, considerable progress has been made in understanding these equations algebraically. \nDr. Nagloo holds a bachelor’s degree in math from the University of Mauritius\, an MSc in pure mathematics from Imperial College London\, and a PhD in mathematics from the University of Leeds in London. \nReception follows in EMS E495.
URL:https://uwm.edu/letters-science/event/the-painleve-equations-through-the-lens-of-algebra-120-years-later/
LOCATION:UWM Lubar Hall\, Room N140\, 3202 N. Maryland Ave.\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Lectures Conferences and Symposiums,UWM Campus Events
ORGANIZER;CN="Mathematical Sciences Department":MAILTO:math-staff@uwm.edu
X-TRIBE-STATUS:
GEO:43.0761608;-87.8822351
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=UWM Lubar Hall Room N140 3202 N. Maryland Ave. Milwaukee WI 53211 United States;X-APPLE-RADIUS=500;X-TITLE=3202 N. Maryland Ave.:geo:-87.8822351,43.0761608
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20230303T140000
DTEND;TZID=America/Chicago:20230303T150000
DTSTAMP:20260606T220757
CREATED:20230221T051039Z
LAST-MODIFIED:20230221T051327Z
UID:10014034-1677852000-1677855600@uwm.edu
SUMMARY:Math Colloquium: Applications of Data Science in Major League Sports
DESCRIPTION:Presented by Dr. Michael Dairyko\, Director of Ticketing Analytics\, Milwaukee Bucks. \nData science is a continuously evolving field that lives at the intersection of mathematics\, statistics\, and computer science. Many industries have started to utilize data science to extract valuable information from their data to assist with strategic planning and decision-making. One such industry is professional sports\, where data science is used to maximize both player and revenue performance. In this talk\, we will review applications of data science that drive revenue for professional sports teams. \nRefreshments follow the colloquium.
URL:https://uwm.edu/letters-science/event/math-colloquium-applications-of-data-science-in-major-league-sports/
LOCATION:UWM EMS Building\, Room E495\, 3200 N. Cramer Avenue\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Lectures Conferences and Symposiums,UWM Campus Events
ORGANIZER;CN="Mathematical Sciences Department":MAILTO:math-staff@uwm.edu
X-TRIBE-STATUS:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20221111T140000
DTEND;TZID=America/Chicago:20221111T153000
DTSTAMP:20260606T220757
CREATED:20221104T191502Z
LAST-MODIFIED:20221104T191520Z
UID:10013873-1668175200-1668180600@uwm.edu
SUMMARY:Math Colloquium: An insertion algorithm on multiset partitions with applications to diagram algebras
DESCRIPTION:Dr. Laura Colmenarejo\, Professor of Mathematics\, North Carolina State University. \nIn algebraic combinatorics\, the Robinson-Schensted-Knuth algorithm is a fundamental correspondence between words and pairs of semistandard tableaux illustrating identities of dimensions of irreducible representations of several groups. In this talk\, I will present a generalization of the Robinson-Schensted-Knuth algorithm to the insertion of two-row arrays of multisets. This generalization leads to new enumerative results that have representation-theoretic interpretation as decomposition of centralizer algebras and the spaces they act on. I will also present a variant of this algorithm for diagram algebras that has the remarkable property that it is well-behaved with respect to restricting a representation to a subalgebra. \nRefreshments to follow.
URL:https://uwm.edu/letters-science/event/math-colloquium-an-insertion-algorithm-on-multiset-partitions-with-applications-to-diagram-algebras/
LOCATION:UWM EMS Building\, Room E495\, 3200 N. Cramer Avenue\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Lectures Conferences and Symposiums,UWM Campus Events
ORGANIZER;CN="Mathematical Sciences Department":MAILTO:math-staff@uwm.edu
X-TRIBE-STATUS:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20221104T140000
DTEND;TZID=America/Chicago:20221104T153000
DTSTAMP:20260606T220757
CREATED:20221025T202020Z
LAST-MODIFIED:20221025T202020Z
UID:10013871-1667570400-1667575800@uwm.edu
SUMMARY:Math Colloquium: Gelfand-Zeitlin Integrable Systems: Where linear algebra\, geometry\, and representation theory meet
DESCRIPTION:Presented by Dr. Mark Colarusso\, Professor of Mathematics\, University of South Alabama. \nIn the 19th century\, physicists were interested in determining the conditions under which the equations of motion for a classical mechanical system could be found by integrating a finite number of times. Such a system was said to be completely integrable. Using symplectic geometry\, we can generalize the notion of an integrable system beyond the realm of physics and into Lie theory and representation theory. Such “abstract” integrable systems can be used to geometrically construct infinite dimensional representations of Lie algebras. \nIn this talk\, I will discuss a family of integrable systems\, the Gelfand-Zeitlin systems\, that arise from purely linear algebraic data. For an nxn complex matrix X\, we consider the eigenvalues of all the ixi submatrices in the top left hand corner of X. These are known as Ritz values and play an important role in numerical linear algebra. We will see how questions about Ritz values naturally lead to the construction of the Gelfand-Zeitlin integrable systems. I will explain results about the geometric properties of these systems and indicate how they answer questions of Parlett and Strang about Ritz values. I will also show how this research provides the foundation for the geometric construction of a category of infinite dimensional representations of certain classical Lie algebras using the theory of quantization.
URL:https://uwm.edu/letters-science/event/math-colloquium-gelfand-zeitlin-integrable-systems-where-linear-algebra-geometry-and-representation-theory-meet/
LOCATION:UWM EMS Building\, Room E495\, 3200 N. Cramer Avenue\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Lectures Conferences and Symposiums,UWM Campus Events
ORGANIZER;CN="Mathematical Sciences Department":MAILTO:math-staff@uwm.edu
X-TRIBE-STATUS:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20221021T140000
DTEND;TZID=America/Chicago:20221021T153000
DTSTAMP:20260606T220757
CREATED:20221011T145906Z
LAST-MODIFIED:20221011T151418Z
UID:10013859-1666360800-1666366200@uwm.edu
SUMMARY:Math Colloquium: The space of all closed subgroups of a Lie group\, especially PSL(2\,R)
DESCRIPTION:If G is a Lie group\, let Sub(G) be the set of all subgroups H of G that are topologically closed subsets of G. There is a natural topology on Sub(G)\, called the Chabauty topology. We’ll define the Chabauty topology\, do a few examples\, and talk about recent progress on the Chabauty space of the Lie group PSL(2\,R)\, where hyperbolic geometry will play a role. \nPresented by Dr. Ian Biringer\, Professor of Mathematics\, Iowa State University.
URL:https://uwm.edu/letters-science/event/math-colloquium-the-space-of-all-closed-subgroups-of-a-lie-group-especially-psl2r/
LOCATION:UWM EMS Building\, Room E495\, 3200 N. Cramer Avenue\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Lectures Conferences and Symposiums,UWM Campus Events
ORGANIZER;CN="Mathematical Sciences Department":MAILTO:math-staff@uwm.edu
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BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20221007T140000
DTEND;TZID=America/Chicago:20221007T150000
DTSTAMP:20260606T220757
CREATED:20220927T163149Z
LAST-MODIFIED:20220927T163149Z
UID:10013828-1665151200-1665154800@uwm.edu
SUMMARY:Math Colloquium: Ehrhart Theory and Partial Permutohedra
DESCRIPTION:Presented by Dr. Erik Insko\, Professor of Mathematics\, Iowa State University. \nIn this talk\, I will give a brief introduction to Ehrhart polynomials\, which count the number of lattice points in a convex lattice polytope and also describe the polytope’s volume. Then I will define the partial permutohedron $P(m\,n)$ and share how a simple sculpting idea has led to several new results and conjectures involving the volume and Ehrhart polynomial of the partial permutohedron $P(m\,n)$ first defined and studied by Heuer and Striker in 2020. One goal of this talk is to be interesting and accessible to undergraduate and graduate students as well as faculty.
URL:https://uwm.edu/letters-science/event/math-colloquium-ehrhart-theory-and-partial-permutohedra/
LOCATION:UWM EMS Building\, Room E495\, 3200 N. Cramer Avenue\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Lectures Conferences and Symposiums,UWM Campus Events
ORGANIZER;CN="Mathematical Sciences Department":MAILTO:math-staff@uwm.edu
X-TRIBE-STATUS:
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BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20220930T140000
DTEND;TZID=America/Chicago:20220930T150000
DTSTAMP:20260606T220757
CREATED:20220927T162852Z
LAST-MODIFIED:20220927T162852Z
UID:10013690-1664546400-1664550000@uwm.edu
SUMMARY:Math Colloquium: Spectral Faux Trees and Coalescing Sets
DESCRIPTION:Presented by Dr. Steve Butler\, Professor of Mathematics\, Iowa State University. \nA classic problem in mathematics is “Can you hear the shape of a drum?” In graph theory\, this is often phrased in terms of the eigenvalues of matrices associated with a graph\, and whether a particular set of eigenvalues is associated with a unique graph. We will look at the existence and construction of graphs which are not trees but share eigenvalues with some tree (these are the “spectral faux trees” and examples where we “cannot hear the shape of a tree”). The answer to this problem varies significantly with which type of matrix is considered and we will consider several common matrices. We will also present a result that unexpectedly came up during the investigation of spectral faux trees that deals with the results of coalescing graphs. \nJoint work with Elena D’Avanzo\, Rachel Heikkinen\, Joel Jeffries\, Alyssa Kruczek\, and Harper Niergarth
URL:https://uwm.edu/letters-science/event/math-colloquium-spectral-faux-trees-and-coalescing-sets/
LOCATION:UWM EMS Building\, Room E495\, 3200 N. Cramer Avenue\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Lectures Conferences and Symposiums,UWM Campus Events
ORGANIZER;CN="Mathematical Sciences Department":MAILTO:math-staff@uwm.edu
X-TRIBE-STATUS:
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BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20220422T140000
DTEND;TZID=America/Chicago:20220422T170000
DTSTAMP:20260606T220757
CREATED:20220408T183935Z
LAST-MODIFIED:20220408T190140Z
UID:10013797-1650636000-1650646800@uwm.edu
SUMMARY:Marden Lecture: The Mathematics of Déjà Vu
DESCRIPTION:The Marden Lecture brings a distinguished guest to campus each year. The lecture is for a general audience and advanced math knowledge is not required – it is designed to explore a fascinating aspect of math. \nThe lecture portion of the event is from 2 to 3 followed by a reception in EMS E495. \nProfessor Amie Wilkinson from the University of Chicago will address the mathematics of déjà vu. Dynamics is an area of mathematics concerned with the motion of spaces (“dynamical systems”) over time. Dynamics has its roots in the late nineteenth century\, when it was developed as a tool to understand physical phenomena\, such as the motion of gas molecules in a box and planets around the sun. A simple and yet powerful concept in dynamics is that of recurrence. In everyday language\, recurrence is the mathematical version of déjà vu: a motion of a space is recurrent if\, given enough time\, it eventually returns to its original configuration (allowing for a small amount of error). In this talk\, I will describe how mathematical results about recurrence can be used to answer surprisingly disparate questions\, from the mixing and unmixing of two ideal gases in a box\, to deep properties of the prime numbers\, to the discovery of exoplanets in nearby solar systems. \nThe Marden Lecture honors Morris Marden (1905 – 1991)\, who founded UWM’s graduate math program and made the department a research department.
URL:https://uwm.edu/letters-science/event/marden-lecture-the-mathematics-of-deja-vu/
LOCATION:UWM Lubar Hall\, Room N140\, 3202 N. Maryland Ave.\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Lectures Conferences and Symposiums,UWM Campus Events
ORGANIZER;CN="Mathematical Sciences Department":MAILTO:math-staff@uwm.edu
X-TRIBE-STATUS:
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