
Geometry, Topology, and Physics Seminar, Winter 2007
Organizers:
Sergei Gukov
and Dave Morrison.
Meets 3:30  5:00 p.m. Fridays in South Hall 6635.
For the first part of the winter quarter, we will continue our study of Ricci flow on threemanifolds, with the goal of understanding the basics of Thurston's geometrization program, Hamilton's strategy for completing that program using Ricci flow, Perelman's technical and conceptual advances in Ricci flow which allow the program to be completed, and relations to physics including the analogy with the renormalization flow in twodimensional quantum field theory.
Other Quarters: [
Fall, 2021;
Winter, 2020;
Fall, 2019;
Spring, 2018;
Winter, 2018;
Fall, 2017;
Spring, 2017;
Wnter, 2017;
Fall, 2016;
Spring, 2016;
Winter, 2016;
Fall, 2015;
Spring, 2015;
Winter, 2014;
Fall, 2013;
Fall, 2012;
Fall, 2011;
Winter, 2011;
Spring, 2010;
Winter, 2010;
Fall, 2009;
Spring, 2009;
Winter, 2009;
Fall, 2008;
Spring, 2008;
Winter, 2008;
Fall, 2007;
Spring, 2007;
Winter, 2007;
Fall, 2006
]
Jan. 12, 19, and 26 
No meeting on these dates.

Feb. 2 
Dave Morrison (UCSB)
25 years ago, Friedan calculated the oneloop renormalization of
a twodimensional sigmamodel with target space an arbitrary Riemannian
manifold and found that the metric should evolve by Ricci flow.
We will explain this result and its connections to the recent work
of Perelman on Ricci flow.
Since the first lecture of this series,
the connection between Perelman's work and renormalization has been
extended by
Tseytlin (http://arXiv.org/abs/hepth/0612296),
and we will discuss this new work as well.
Audio (incomplete: sorry!) [ mp3,
wma ];
Lecture notes version 1;
Lecture notes version 2.

Feb. 9 

Feb. 16 
Dave Morrison (UCSB)

Feb. 23 

Mar. 2 
ShingTung Yau (Harvard University)
Audio [ mp3,
wma ];
Slides.

Mar. 9 
Dave Morrison (UCSB)
In a lecture in December, I briefly discussed the dimensional regularization
of sigma models, which is the technical tool underlying
the calculation of Ricci flow as the oneloop approximation to
renormalization flow on the space of Riemannian metrics on a manifold.
In this week's lecture will I give a detailed presentation of
dimensional regularization and the renormalization calculations.
Audio [ mp3,
wma ];
Lecture notes.

Mar. 16 
No meeting.


