Geometry and Topology Seminar 2019-2020: Difference between revisions

From UW-Math Wiki
Jump to navigation Jump to search
No edit summary
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 19:14, 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