**# click the upper-left icon to select videos from the playlist**

source: International Centre for Theoretical Sciences 2016年5月24日

PROGRAM URL : http://www.icts.res.in/program/hb2016

DATES: Monday 21 Mar, 2016 - Friday 01 Apr, 2016

VENUE: Madhava Lecture Hall, ICTS Bangalore

DESCRIPTION:

Higgs bundles arise as solutions to noncompact analog of the Yang-Mills equation. Hitchin showed that irreducible solutions of the GL(2,C) Yang-Mills equation on a compact Riemann surface X are precisely the polystable Higgs vector bundles on X of rank two and degree zero. Subsequently Simpson proved that irreducible solutions of the GL(r,C) Yang-Mills equation on a compact Kaehler manifold X are precisely the polystable Higgs vector bundles on X of rank r and vanishing Chern classes.

Hitchin showed that the moduli spaces of stable Higgs bundles give examples of hyper-Kaehler manifolds and provide examples of completely integrable systems. Simpson proved basic theorems on fundamental group of Kaehler manifolds using the identification of Higgs bundles with the solutions of the Yang-Mills equation.

The moduli space of Higgs bundles is then full of rich geometric structures, but the most interesting part of the story is not just this but the different points of view that one can use for studying this moduli space, which show this object as the precise mathematical context for different physical theories. For instance, the moduli space of SL(2, C)-Higgs bundles was proved by T. Hausel and M. Thaddeus, to be the first non-trivial example for Strominger-Yau-Zaslow formulation of Mirror symmetry (symplectic formulation concerning pairs of Calabi-Yau manifolds) satisfying at the same time the Batyrev-Borisov mirror symmetry definition (which is comprised of a condition on the Hodge numbers of those manifolds).

Higgs bundles play a very central role in the works of G. Laumon, L. Lafforgue and B.C. Ngô in their work on Langlands program (the last two were awarded Field's medal in 2002 and 2010 respectively). The Geometric Langlands Program, in terms of the Monotonen-Olive duality conjecture, states that maximally supersymmetric gauge theory in four dimensions with gauge group G is isomorphic to a similar gauge theory with gauge group being the Langlands dual of G. From the physical viewpoint, the Monotonen-Olive duality can be regarded as a nonabelian generalization of electric magnetic duality. Gukov and Witten interpreted the ramified (or punctured) version of the Geometric Langlands Program in physical terms.

There will be two short courses during the program:

1. Richard Wentworth will lecture on the work of Hitchin-Donaldson-Corlette-Simpson which prove that solutions of the Yang-Mills-Higgs equation are precisely the polystable Higgs bundles with vanishing Chern classes.

2. Laura Schaposnik will lecture on the completely integrable systems given by the moduli spaces of Higgs bundles on a Riemann surface.

Some participants will deliver one lecture each and there will be about 30 talks.

ORGANIZERS: V. Balaji, I. Biswas and A. Parameswaran

Quantum Curves and Gaiotto's Conjecture by Mulase Motohico 1:06:56

Integrable systems and Torelli theorem for parabolic Higgs bundles by Marina Logares 55:55

Projective structures on Riemann surfaces and their monodromy by Subhojoy Gupta 1:03:14

Holomorphic rigid geometric structures on compact manifolds by Sorin Dumitrescu 1:07:05

Higgs bundles, harmonic maps, and applications by Richard Wentworth 1:06:18

Higgs bundles, harmonic maps, and applications by Richard Wentworth 1:05:33

Higgs bundles, harmonic maps, and applications by Richard Wentworth 1:04:11

Hilbert-Kunz Density Function and Hilbert-Kunz Multiplicity by Vijaylaxmi Trivedi 1:00:30

Higgs bundles, harmonic maps, and applications by Richard Wentworth 1:05:30

Higgs bundles, harmonic maps, and applications by Richard Wentworth 1:08:57

Deforming irregular singularities by Jacques Hurtubise 1:02:04

The Weil-Petersson current for moduli of vector bundles and... by Schumacher 59:48

Homotopy of Character Varieties by Sean Lawton 1:07:41

Minimal Surfaces in $CH^2$ and their Higgs Bundles by John Loftin 1:05:35

The Quillen Determinant Bundle and Geometric Quantization of Various Moduli Spaces by Rukmini Dey 38:14

An introduction to spectral data for Higgs bundles.. by Laura Schaposnik 1:03:37

An introduction to spectral data for Higgs bundles.. by Laura Schaposnik 1:06:10

An introduction to spectral data for Higgs bundles.. by Laura Schaposnik 57:16

An introduction to spectral data for Higgs bundles.. by Laura Schaposnik 1:04:36

Stable Representation Theory and Spaces of Flat Connections by Daniel Ramras 43:35

Quantum representations and higher-rank Prym varieties by Martens Johan 1:08:40

Homology Smale-Barden manifolds with K-contact and Sasakian structures by Aleksy Tralle 59:58

Locus of nonvery stable bundles and it's geometry by Sarbeswar Pal 57:19

On the existence of the fundamental group scheme by Marco Antei 1:05:33

Some aspects of open de Rham spaces by Wong, Michael Lennox 1:02:41

Equivariant principal bundle over toric variety by Arijit Dey 1:07:58

Rational cuspidal curves on del-Pezzo surfaces by Ritwik Mukherjee 1:03:26

On the semiregularity map of Bloch by Ananyo Dan 1:01:06

Moduli of certain Weighted Pointed Rational Curves by Chitrabhanu Chaudhuri 1:01:50

## No comments:

Post a Comment