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DTSTART;TZID=America/Chicago:20250307T140000
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DTSTAMP:20260418T211137
CREATED:20250113T160838Z
LAST-MODIFIED:20250226T151306Z
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SUMMARY:Colloquium: Dr. Jason DeBlois
DESCRIPTION:Some Things We Do and Don’t Know About Knots\nDr. Jason DeBlois\nAssociate Professor\nUniversity of Pittsburgh \nIn this talk\, “knot” will mean a circle embedded in three-dimensional space. These have been formally studied since the late 19th century. More recently\, new computational and geometric tools have allowed us to make substantial progress on understanding the landscape of knots and their invariants\, but they have also raised new questions. I will introduce the study of knots\, sketch its history\, and describe what is known (to me) about some of these questions relating to hyperbolic geometry.
URL:/math/event/colloquium-jason-deblois/
LOCATION:EMS Building\, E495\, 3200 N Cramer St\, Milwaukee\, WI\, United States
CATEGORIES:Colloquia
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DTSTART;TZID=America/Chicago:20250314T140000
DTEND;TZID=America/Chicago:20250314T150000
DTSTAMP:20260418T211137
CREATED:20250217T150523Z
LAST-MODIFIED:20250217T150552Z
UID:10016208-1741960800-1741964400@uwm.edu
SUMMARY:Colloquium: Prof. Shamgar Gurevich
DESCRIPTION:How you think on a function defined on 0\,1\,…\,N-1?\nProf. Shamgar Gurevich\nProfessor of Mathematics\nUniversity of Wisconsin-Madison \nBetween thousand to million times per day\, your cellphone calculates the Fourier Transform (FT) of certain functions defined on 0\,1\,…\,N-1\, with N large (order of magnitude of thousands and more). The calculation is done using the Fast Fourier Transform (FFT) – discovered by Cooley–Tukey in 1965 and by Gauss in 1805. \nIn the lecture I want to advertise a beautiful way—due to Auslander-Tolimieri—to obtain the FFT as a natural consequence of an answer to the following: \nQUESTION: How to think on the space of functions on the set 0\,1\,…\,N-1? \nEngineers tell us that there are two answers for this question: \n(A) as functions on that set\, where 0\,1\,…\,N-1 regarded as times; \nand\, \n(B) as functions on that set\, where 0\,1\,…\,N-1 regarded frequencies; \nand then the FT is an operator translating between the two spaces. \nIn the lecture\, I will explain that there is another answer\, i.e.\, a not so well-known third space (C)\, of arithmetic nature\, that also gives an answer to the above question\, and then the FFT appears simply as the composition of two operators:\nthe one translating between spaces (A) and (C)\, and the one that translates (C) to (B). \nRemark: The lecture is prepared to be understood to anyone who is familiar with basic linear algebra. In particular\, advanced undergraduate students\, from computer science\, engineering\, mathematics\, physics\, etc\, are more than welcome to attend.
URL:/math/event/colloquium-prof-shamgar-gurevich/
LOCATION:EMS Building\, E495\, 3200 N Cramer St\, Milwaukee\, WI\, United States
CATEGORIES:Colloquia
ORGANIZER;CN="The Department of Mathematical Sciences":MAILTO:math-staff@uwm.edu
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DTSTART;TZID=America/Chicago:20250328T140000
DTEND;TZID=America/Chicago:20250328T150000
DTSTAMP:20260418T211137
CREATED:20250324T151551Z
LAST-MODIFIED:20250324T151551Z
UID:10016215-1743170400-1743174000@uwm.edu
SUMMARY:Colloquium: Dr. Lauren Rose
DESCRIPTION:Quads\, Finite Geometry\, and Sidon Sets\nDr. Lauren Rose\nAssociate Professor of Mathematics\nBard College \nQuads is a SET-like card game\, produced by the AWM under the name “EvenQuads”. The cards can be represented as points in $\mathbb{Z}_2^6$​\, where a quad in the game corresponds to an affine plane in the finite geometry$ AG(6\,2)$. Our primary focus is on quad-free collections of cards\, which correspond to Sidon sets. We explore an Quads analog of the “Cap Set” problem for SET\, presenting results and ongoing research.
URL:/math/event/colloquium-dr-lauren-rose/
LOCATION:EMS Building\, EMS E495\, 3200 Cramer St\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Colloquia
ORGANIZER;CN="The Department of Mathematical Sciences":MAILTO:math-staff@uwm.edu
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