Colloquia/Fall18: Difference between revisions
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Revision as of 17:12, 1 September 2015
Mathematics Colloquium
All colloquia are on Fridays at 4:00 pm in Van Vleck B239, unless otherwise indicated.
Fall 2015
Go to next semester, Spring 2016.
| date | speaker | title | host(s) |
|---|---|---|---|
| September 4 | Isaac Goldbring (UIC) | Hindman's theorem and idempotent types | Andrews/Lempp |
| September 11 | Doron Puder (IAS) | Word-Measures on Groups | Gurevich |
| September 18 | Izzet Coskun (UIC) | The geometry of points in the plane | Erman |
| September 25 | Abbas Ourmazd (UW-Milwaukee) | Mitchell | |
| October 2 | |||
| October 9 | Igor Mezic (UC Santa Barbara) | Budisic, Thiffeault | |
| October 16 | Hadi Salmasian (Ottawa) | Gurevich | |
| October 23 | Wisconsin Science Festival. | ||
| October 30 | Ruth Charney (Brandeis) | Dymarz | |
| November 6 | Reserved *S | ||
| November 13 | Reserved *T | ||
| November 20 | Reserved | ||
| November 27 | University Holiday | No Colloquium | |
| December 4 | Reserved | ||
| December 11 | Reserved |
Abstracts
September 4: Isaac Goldbring (UIC)
September 11: Doron Puder (IAS)
Title: Word-Measures on Groups.
Abstract: Let w be a word in the free group on k generators, and let G be a finite (compact) group. The word w induces a measure on G by substituting the letters of w with k independent uniformly (Haar) chosen random elements of G and evaluating the product. Questions about word-measures on groups attracted attention in recent years both for their own sake and as a tool to analyze random walks on groups.
We will explain some properties of word-measure, give examples and state conjectures. We will also talk about recent results regarding word-measures on symmetric groups and word-measures on unitary groups.
September 18: Izzet Coskun (UIC)
Title: The geometry of points in the plane
Abstract: Grothendieck's Hilbert scheme of points is a smooth compactification of the configuration space of points in the plane. It has close connections with combinatorics, representation theory, mathematical physics and algebraic geometry. In this talk, I will survey some of the basic properties of this beautiful space. If time permits, I will discuss joint work with Arcara, Bertram and Huizenga on codimension one subvarieties of the Hilbert scheme.