Colloquia: Difference between revisions

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-<b>UW Madison mathematics Colloquium is on Fridays at 4:00 pm. </b>
+<b>UW-Madison Mathematics Colloquium is on Fridays at 4:00 pm in Van Vleck B239 unless otherwise noted.</b>
-<!--- in Van Vleck B239, '''unless otherwise indicated'''. --->
+Contacts for the colloquium are Michael Kemeny (spring) and Dallas Albritton (fall).
+Everyone in the math department is subscribed to the mathcolloquium@g-groups.wisc.edu mailing list.
-== February 3, 2023, Friday at 4pm [https://sites.google.com/a/uwlax.edu/tdas/ Facundo Mémoli] (Ohio State University) ==
+==This Semester's Colloquia==
-(host: Lyu)
-The Gromov-Hausdorff distance between spheres.
+[[Colloquia/Spring 2025|Spring 2025]]
-The Gromov-Hausdorff distance is a fundamental tool in Riemanian geometry (through the topology it generates) and is also utilized in applied geometry and topological data analysis as a metric for expressing the stability of methods which process geometric data (e.g. hierarchical clustering and persistent homology barcodes via the Vietoris-Rips filtration). In fact, distances such as the Gromov-Hausdorff distance or its Optimal Transport variants (i.e. the so-called Gromov-Wasserstein distances) are nowadays often invoked in applications related to data classification.
+==Future Colloquia==
-Whereas it is often easy to estimate the value of the Gromov-Hausdorff distance between two given metric spaces, its ''precise'' value is rarely easy to determine. Some of the best estimates follow from considerations related to both the stability of persistent homology and to Gromov's filling radius. However, these turn out to be non-sharp.
+[[Colloquia/Fall2025 | Fall 2025]]
-In this talk, I will describe these estimates and also results which permit calculating the precise value of the Gromov-Hausdorff between pairs of spheres (endowed with their usual geodesic distance). These results involve lower bounds which arise from a certain version of the Borsuk-Ulam theorem that is applicable to discontinuous maps, and also matching upper bounds which are induced from specialized constructions of (a posteriori optimal) ``correspondences" between spheres.
+==Past Colloquia ==
-== February 24, 2023, Cancelled/available ==
+[[Colloquia/Fall 2024|Fall 2024]]
-== March 3, 2023, Friday at 4pm [https://faculty.washington.edu/steinerb/ Stefan Steinerberger]  (University of Washington) ==
-(hosts: Shaoming Guo, Andreas Seeger)
+[[Colloquia/Spring2024|Spring 2024]]
-== March 8, 2023, Wednesday at 4pm [https://math.yale.edu/people/yair-minsky Yair Minsky]  (Yale University) ==
+[[Colloquia/Fall 2023|Fall 2023]]
-Distinguished lectures
+[[Colloquia/Spring2023|Spring 2023]]
-(host: Kent)
-== March 10, 2023, Friday at 4pm [https://math.yale.edu/people/yair-minsky Yair Minsky]  (Yale University) ==
-Distinguished lectures
-(host: Kent)
-== March 24, 2023 , Friday at 4pm  [https://www.carolynrabbott.com/ Carolyn Abbott] (Brandeis University) ==
-(host: Dymarz, Uyanik, WIMAW)
-== March 31, 2023 , Friday at 4pm [http://www.math.toronto.edu/balint/ Bálint Virág] (University of Toronto) ==
-(host: Benedek Valko)
-== April 7, 2023, Friday at 4pm  [https://www.mi.fu-berlin.de/math/groups/fluid-dyn/members/rupert_klein.html Rupert Klein] (FU Berlin) ==
-Wasow lecture
-(hosts: Smith, Stechmann)
-== April 21, 2023, Friday at 4pm [https://sternber.pages.iu.edu/ Peter Sternberg]  (Indiana University) ==
-(hosts: Feldman, Tran)
-== Future Colloquia ==
-[[Colloquia/Fall2023|Fall 2023]]
-== Past Colloquia ==
 [[Colloquia/Fall2022|Fall 2022]]

Colloquia: Difference between revisions

Latest revision as of 15:35, 24 January 2025

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