Difference between revisions of "Geometry and Topology Seminar"

From UW-Math Wiki
Jump to: navigation, search
(Fall 2010)
Line 11: Line 11:
 
|September 10
 
|September 10
 
|[http://www.math.wisc.edu/~oh/ Yong-Geun Oh] (UW Madison)
 
|[http://www.math.wisc.edu/~oh/ Yong-Geun Oh] (UW Madison)
 +
|[[#Yong-Geun Oh (UW Madison)|
 
|''Counting embedded curves in Calabi-Yau threefolds and Gopakumar-Vafa invariants''
 
|''Counting embedded curves in Calabi-Yau threefolds and Gopakumar-Vafa invariants''
 
|local
 
|local
Line 16: Line 17:
 
|September 24
 
|September 24
 
|[http://sites.google.com/site/polterov/home/ Leonid Polterovich] (Tel Aviv U and U of Chicago)
 
|[http://sites.google.com/site/polterov/home/ Leonid Polterovich] (Tel Aviv U and U of Chicago)
 +
|[[#Leonid Polterovich (Tel Aviv U and U of Chicago)|
 
|''TBA''
 
|''TBA''
 
|[http://www.math.wisc.edu/~oh/ Yong-Geun]
 
|[http://www.math.wisc.edu/~oh/ Yong-Geun]
Line 21: Line 23:
 
|October 22
 
|October 22
 
|[http://www.mathi.uni-heidelberg.de/~banagl/ Markus Banagl] (U. Heidelberg)
 
|[http://www.mathi.uni-heidelberg.de/~banagl/ Markus Banagl] (U. Heidelberg)
 +
|[[# Markus Banagl (U. Heidelberg)|
 
|''TBA''
 
|''TBA''
 
|[http://www.math.wisc.edu/~maxim/ Maxim]
 
|[http://www.math.wisc.edu/~maxim/ Maxim]
Line 26: Line 29:
 
|November 5
 
|November 5
 
|[http://www.math.psu.edu/tabachni/ Sergei Tabachnikov]  (Penn State)
 
|[http://www.math.psu.edu/tabachni/ Sergei Tabachnikov]  (Penn State)
 +
|[[#Sergei Tabachnikov]  (Penn State)|
 
|''TBA''
 
|''TBA''
 
|[http://www.math.wisc.edu/~maribeff/ Gloria]
 
|[http://www.math.wisc.edu/~maribeff/ Gloria]
 
|-
 
|-
 
|-
 
|-
 +
== Abstracts ==
 +
===Yong-Geun Oh (UW Madison)===
 +
''Counting embedded curves in Calabi-Yau threefolds and Gopakumar-Vafa invariants''
 +
 +
Gopakumar-Vafa BPS invariant is some integer counting invariant of the cohomology
 +
of D-brane moduli spaces in string theory. In relation to the Gromov-Witten theory,
 +
it is expected that the invariant would coincide with the `number' of embedded
 +
(pseudo)holomorphic curves (Gopakumar-Vafa conjecture). In this talk, we will explain the speaker's recent
 +
result that the latter integer invariants can be defined for a generic choice of
 +
compatible almost complex structures. We will also discuss the corresponding
 +
wall-crossing phenomena and some open questions towards a complete solution to
 +
the Gopakumar-Vafa conjecture.
 +
 +
===Leonid Polterovich (Tel Aviv U and U of Chicago)===
 +
''TBA''
 +
 +
===Markus Banagl (U. Heidelberg)===
 +
''TBA''
 +
 +
===Sergei Tabachnikov (Penn State)===
 +
''TBA''
 
|}
 
|}

Revision as of 13:14, 6 September 2010

Fall 2010

The seminar will be held in room B901 of Van Vleck Hall on Fridays from 1:20pm - 2:10pm

Abstracts

Yong-Geun Oh (UW Madison)

Counting embedded curves in Calabi-Yau threefolds and Gopakumar-Vafa invariants

Gopakumar-Vafa BPS invariant is some integer counting invariant of the cohomology of D-brane moduli spaces in string theory. In relation to the Gromov-Witten theory, it is expected that the invariant would coincide with the `number' of embedded (pseudo)holomorphic curves (Gopakumar-Vafa conjecture). In this talk, we will explain the speaker's recent result that the latter integer invariants can be defined for a generic choice of compatible almost complex structures. We will also discuss the corresponding wall-crossing phenomena and some open questions towards a complete solution to the Gopakumar-Vafa conjecture.

Leonid Polterovich (Tel Aviv U and U of Chicago)

TBA

Markus Banagl (U. Heidelberg)

TBA

Sergei Tabachnikov (Penn State)

TBA

date speaker title host(s)
September 10 Yong-Geun Oh (UW Madison) [[#Yong-Geun Oh (UW Madison)| Counting embedded curves in Calabi-Yau threefolds and Gopakumar-Vafa invariants local
September 24 Leonid Polterovich (Tel Aviv U and U of Chicago) [[#Leonid Polterovich (Tel Aviv U and U of Chicago)| TBA Yong-Geun
October 22 Markus Banagl (U. Heidelberg) [[# Markus Banagl (U. Heidelberg)| TBA Maxim
November 5 Sergei Tabachnikov (Penn State) [[#Sergei Tabachnikov] (Penn State)| TBA Gloria