Riemannian geometry of Diff(S1)/S1 and representations of the Virasoro algebra
M. Gordina, P. Lescot
Abstract
The main result of the paper is a computation of the Ricci curvature of /S1. Unlike earlier results on the subject, we do not use the Kähler structure symmetries to compute the Ricci curvature, but rather rely on classical finite-dimensional results of Nomizu et al on Riemannian geometry of homogeneous spaces.
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