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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).


=Fall 2021=
Everyone in the math department is subscribed to the mathcolloquium@g-groups.wisc.edu mailing list.


== September 17, 2021, B239 + [http://go.wisc.edu/wuas48 Live Stream], [https://markshus.wixsite.com/math Mark Shusterman] (Harvard) ==


(hosted by Gurevich)
This semester's colloquia: [[Colloquia/Spring 2025|Spring 2025]]
==Future Colloquia==
==Past Colloquia ==


'''Finitely Presented Groups in Arithmetic Geometry'''
[[Colloquia/Fall 2024|Fall 2024]]


I will report on recent works, in part joint with Esnault—Srinivas, and with Jarden, on the finite presentability of several (profinite) groups arising in algebraic geometry and in number theory. These results build on a cohomological criterion of Lubotzky involving Euler characteristics. I will try to explain the analogy, rooted in arithmetic topology, between these results and classical facts about fundamental groups of three-dimensional manifolds.
[[Colloquia/Spring2024|Spring 2024]]


== September 24, 2021, B239, [https://math.wisc.edu/staff/paul-sean/ Sean Paul] (UW-Madison) ==
[[Colloquia/Fall 2023|Fall 2023]]
'''The Tian-Yau-Donaldson conjecture for general polarized manifolds'''


According to the Yau-Tian-Donaldson conjecture, the existence of a constant scalar curvature Kähler (cscK) metric in the cohomology class of an ample line bundle L on a compact complex manifold X should be equivalent to an algebro-geometric "stability condition" satisfied by the pair (X,L).  The cscK metrics are the critical points of Mabuchi's K-energy functional M, defined on the space of Kähler potentials, and an important result of Chen-Cheng shows that cscK metrics exist iff M satisfies a standard growth condition (coercivity/properness). Recently the speaker has shown that the K-energy is indeed proper if and only if the polarized manifold is stable. The stability condition is closely related to the classical notion of Hilbert-Mumford stability.  The speaker will give a non-technical general account of the many areas of mathematics that are involved in the proof. In particular, he hopes to discuss the surprising role played by arithmetic geometry​in the spirit of Arakelov, Faltings, and Bismut-Gillet- Soule.
[[Colloquia/Spring2023|Spring 2023]]


== October 1, 2021, B239, [https://people.math.wisc.edu/~andreic/ Andrei Caldararu] (UW-Madison) ==
[[Colloquia/Fall2022|Fall 2022]]


== October 8, 2021, Zoom, [https://www.maths.ox.ac.uk/people/jon.chapman Jon Chapman] (University of Oxford) ==
[[Spring 2022 Colloquiums|Spring 2022]]


('''Wasow lecture'''; hosted by Thiffeault)
[[Colloquia/Fall2021|Fall 2021]]
 
'''Asymptotics beyond all orders: the devil's invention?'''
 
"Divergent series are the invention of the devil, and it is shameful to base on them any demonstration whatsoever." --- N. H. Abel.
 
The lecture will introduce the concept of an asymptotic series, showing how useful divergent series can be, despite Abel's reservations. We will then discuss Stokes' phenomenon, whereby the coefficients in the series appear to change discontinuously. We will show how understanding Stokes' phenomenon is the key which allows us to determine the qualitative and quantitative behaviour of the solution in many practical problems. Examples will be drawn from the areas of surface waves on fluids, crystal growth, dislocation dynamics, and Hele-Shaw flow.
 
== October 11, 13, 15, 2021, Zoom,  '''[Mon, Wed, Fri 4-5pm]''', [https://www.maths.usyd.edu.au/u/geordie/ Geordie Williamson] (University of Sydney) ==
 
(Special lecture series; hosted by Gurevich)
 
== October 22, 2021, Zoom,  [https://math.berkeley.edu/people/faculty/vera-serganova Vera Serganova] (UC Berkeley) ==
 
(hosted by Gurevich/Gorin)
 
== October 29, 2021 , [https://web.math.princeton.edu/~aionescu/ Alexandru Ionescu] (Princeton University) ==
 
(hosted by Wainger)
 
== November 5, 2021 , [https://faculty.washington.edu/jathreya/ Jayadev S. Athreya] (University of Washington) ==
 
(hosted by Uyanik)
 
== November 12, 2021 , [https://sites.tufts.edu/kasso/ Kasso Okoudjou] (Tufts University) ==
 
(hosted by Stovall)
 
== November 19, 2021 , [https://math.wisc.edu/ TBA] (TBA) ==
 
(reserved by the hiring committee)
 
== December 3, 2021 , [https://math.wisc.edu/ TBA] (TBA) ==
 
(reserved by the hiring committee)
 
== December 10, 2021 , [https://math.wisc.edu/ TBA] (TBA) ==
 
(reserved by the hiring committee)
 
== Future ==
 
[[Colloquia/Spring2022|Spring 2022]]
 
== Past Colloquia ==


[[Colloquia/Spring2021|Spring 2021]]
[[Colloquia/Spring2021|Spring 2021]]

Latest revision as of 06:22, 17 December 2024


UW-Madison Mathematics Colloquium is on Fridays at 4:00 pm in Van Vleck B239 unless otherwise noted.

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.


This semester's colloquia: Spring 2025

Future Colloquia

Past Colloquia

Fall 2024

Spring 2024

Fall 2023

Spring 2023

Fall 2022

Spring 2022

Fall 2021

Spring 2021

Fall 2020

Spring 2020

Fall 2019

Spring 2019

Fall 2018

Spring 2018

Fall 2017

Spring 2017

Fall 2016

Spring 2016

Fall 2015

Spring 2015

Fall 2014

Spring 2014

Fall 2013

Spring 2013

Fall 2012

WIMAW

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