Difference between revisions of "Geometry and Topology Seminar"

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In the fall of 2020, we will hold '''online meetings''' on  
 
In the fall of 2020, we will hold '''online meetings''' on  
[https://uwmadison.zoom.us/j/9457895762 Zoom platform]   
+
[https://uwmadison.zoom.us/j/94578957620 Zoom platform]   
 
(available every '''Friday 1:00pm - 2:30pm''').
 
(available every '''Friday 1:00pm - 2:30pm''').
 
<br>  
 
<br>  
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!align="left" | host(s)
 
!align="left" | host(s)
 
|-
 
|-
|TBA
+
|Oct. 23
 +
|Yu Li (Stony Brook)
 +
| On the ancient solutions to the Ricci flow
 +
|(Huang)
 +
|-
 +
|Oct. 30
 +
|Yi Lai (Berkeley)
 +
| A family of 3d steady gradient solitons that are flying wings
 +
|(Huang)
 +
|-
 +
|Nov. 6
 +
|Jiyuan Han (Purdue)
 +
| TBA
 +
|(Chen)
 +
|-
 +
|Nov. 20
 
|Max Hallgren (Cornell)
 
|Max Hallgren (Cornell)
 
| TBA
 
| TBA
 
|(Huang)
 
|(Huang)
 
|-
 
|-
|TBA
+
|Dec. 4
|Yi Lai (Berkeley)
+
|Yang Li (IAS)
 
| TBA
 
| TBA
|(Huang)
+
|(Chen)
 
|}
 
|}
  
 
== Fall Abstracts ==
 
== Fall Abstracts ==
  
 +
===Yu Li===
 +
Ancient solutions model the singularity formation of the Ricci flow.  In two and three dimensions, we currently have complete classifications for κ-noncollapsed ancient solutions, while the higher dimensional problem remains open. This talk will survey some recent developments of κ-noncollapsed ancient solutions with nonnegative curvature in higher dimensions.
 +
 +
===Yi Lai===
 +
We found a family of $\mathbb{Z}_2\times O(2)$-symmetric 3d steady gradient Ricci solitons. We show that these solitons are all flying wings. This confirms a conjecture of Hamilton.
  
 
== Archive of past Geometry seminars ==
 
== Archive of past Geometry seminars ==

Latest revision as of 14:55, 12 October 2020

The Geometry and Topology seminar meets in room 901 of Van Vleck Hall on Fridays from 1:20pm - 2:10pm. For more information, contact Shaosai Huang.

In the fall of 2020, we will hold online meetings on Zoom platform (available every Friday 1:00pm - 2:30pm).


Hawk.jpg


Fall 2020

date speaker title host(s)
Oct. 23 Yu Li (Stony Brook) On the ancient solutions to the Ricci flow (Huang)
Oct. 30 Yi Lai (Berkeley) A family of 3d steady gradient solitons that are flying wings (Huang)
Nov. 6 Jiyuan Han (Purdue) TBA (Chen)
Nov. 20 Max Hallgren (Cornell) TBA (Huang)
Dec. 4 Yang Li (IAS) TBA (Chen)

Fall Abstracts

Yu Li

Ancient solutions model the singularity formation of the Ricci flow.  In two and three dimensions, we currently have complete classifications for κ-noncollapsed ancient solutions, while the higher dimensional problem remains open. This talk will survey some recent developments of κ-noncollapsed ancient solutions with nonnegative curvature in higher dimensions.

Yi Lai

We found a family of $\mathbb{Z}_2\times O(2)$-symmetric 3d steady gradient Ricci solitons. We show that these solitons are all flying wings. This confirms a conjecture of Hamilton.

Archive of past Geometry seminars

2019-2020 Geometry_and_Topology_Seminar_2019-2020

2018-2019 Geometry_and_Topology_Seminar_2018-2019

2017-2018 Geometry_and_Topology_Seminar_2017-2018

2016-2017 Geometry_and_Topology_Seminar_2016-2017

2015-2016: Geometry_and_Topology_Seminar_2015-2016

2014-2015: Geometry_and_Topology_Seminar_2014-2015

2013-2014: Geometry_and_Topology_Seminar_2013-2014

2012-2013: Geometry_and_Topology_Seminar_2012-2013

2011-2012: Geometry_and_Topology_Seminar_2011-2012

2010: Fall-2010-Geometry-Topology
Dynamics_Seminar_2020-2021