Difference between revisions of "Cookie seminar"

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'''Seminar talks''':
 
'''Seminar talks''':
  
September 24
 
{|border="2"
 
|Speaker ||  Diane Holcomb
 
|-
 
|Title || The Probabilistic method (using probability to solve questions in other areas of mathematics)
 
|}
 
  
October 1
+
==Spring 2013==
{|border="2"
 
|Speaker || Jean-Luc Thiffeault
 
|-
 
|Title || The mathematics of juggling (with no physical demonstration whatsoever)
 
|}
 
  
October 8
+
==Monday, January 29, Will Mitchell==
{|border="2"
 
|Speaker || Nicos Georgiou
 
|-
 
|Title ||  Growth models on the Quadrant
 
|}
 
  
October 15
 
{|border="2"
 
|Speaker || 
 
|-
 
|Title ||
 
|-
 
|Abstract ||
 
|}
 
  
October 22
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Title: an unsolved graph isomorphism problem from plane geometry
{|border="2"
 
|Speaker ||  Joel Robbin
 
|-
 
|Title || Parking a Car and Lie Brackets.
 
|-
 
|Abstract ||
 
This is an account of Ed Nelson's explanation of Lie brackets and car parking
 
on pages 33-36 of his 1967 book on Tensor Analysis
 
(see https://web.math.princeton.edu/~nelson/books/ta.pdf).
 
It may become an exercise in Diermar Salamon's version
 
(see http://www.math.ethz.ch/%7Esalamon/PREPRINTS/diffgeo.pdf)
 
of my Differential Geometry course from 1982
 
(see http://www.math.wisc.edu/~robbin/0geom.pdf).
 
My current writeup is at http://www.math.wisc.edu/~robbin/parking_a_car.pdf.
 
|}
 
  
October 29
+
Abstract: A geometric 4-configuration is a collection of $n$ lines and $n$ points in
{|border="2"
+
the Euclidean plane with the property that each of the lines passes through exactly four
|Speaker || Seymour Parter
+
of the points, and each of the points lies on exactly four of the lines. No
|-
+
illustration of a 4-configuration appeared in print until 1980.  The so-called
|Title ||  Life in a Closed City: Los Alamos, NM Circa 1951
+
"celestial configurations" are a well-behaved family of these objects. After discussing
|}
+
the construction and nomenclature of the celestial configurations, I'll describe an open
 
+
problem regarding their graph-theoretical properties.
November 5
 
{|border="2"
 
|Speaker || Silas Johnson
 
|-
 
|Title || Arrow's impossibility theorem
 
|-
 
|Abstract ||
 
|}
 
 
 
 
 
November 12
 
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|Speaker ||  Paul Tveite
 
|-
 
|Title || Solvability of Games
 
|-
 
|Abstract ||
 
|}
 
 
 
 
 
November 19
 
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|Speaker || Special Seminar
 
|-
 
|Title || Teaching opportunities in the math department
 
|-
 
|Abstract ||
 
|}
 
 
 
 
 
November 26
 
{|border="2"
 
|Speaker || 
 
|-
 
|Title ||
 
|-
 
|Abstract ||
 
|}
 

Revision as of 16:43, 22 January 2013

General Information: Cookie seminar will take place on Mondays at 3:30 in the 9th floor lounge area. Talks should be of interest to the general math community, and generally will not run longer then 20 minutes. Everyone is welcome to talk, please just sign up on this page. Alternatively I will also sign interested people up at the seminar itself. As one would expect from the title there will generally be cookies provided, although the snack may vary from week to week.

To sign up please provide your name and a title. Abstracts are welcome but optional.

Seminar talks:


Spring 2013

Monday, January 29, Will Mitchell

Title: an unsolved graph isomorphism problem from plane geometry

Abstract: A geometric 4-configuration is a collection of $n$ lines and $n$ points in the Euclidean plane with the property that each of the lines passes through exactly four of the points, and each of the points lies on exactly four of the lines. No illustration of a 4-configuration appeared in print until 1980. The so-called "celestial configurations" are a well-behaved family of these objects. After discussing the construction and nomenclature of the celestial configurations, I'll describe an open problem regarding their graph-theoretical properties.