PIRSA:17020017

Critical points and spectral curves

Hitchin, N. (2017). Critical points and spectral curves. Perimeter Institute. https://pirsa.org/17020017

Hitchin, Nigel. Critical points and spectral curves. Perimeter Institute, Feb. 13, 2017, https://pirsa.org/17020017 

          @misc{ pirsa_PIRSA:17020017,
            doi = {10.48660/17020017},
            url = {https://pirsa.org/17020017},
            author = {Hitchin, Nigel},
            keywords = {Mathematical physics},
            language = {en},
            title = {Critical points and spectral curves},
            publisher = {Perimeter Institute},
            year = {2017},
            month = {feb},
            note = {PIRSA:17020017 see, \url{https://pirsa.org}}
          }

Nigel Hitchin University of Oxford

DOI 10.48660/17020017
Collection
Talk Type Conference
Subject

Abstract

Critical values of the integrable system correspond to singular spectral curves. In this talk we shall discuss critical points, points in the moduli space where one of the Hamiltonian vector fields vanishes. These involve torsion-free sheaves on the spectral curve instead of line bundles and a lifting to a 3-manifold which fibres over the cotangent bundle. The case of rank 2 will be described in more detail.