Metric transformations under collapsing of Riemannian manifolds

Details Metric transformations under collapsing of Riemannian manifolds Metric transformations under collapsing of Riemannian manifolds

2003-03-11

arxiv.org/abs/math/0303122v2

Mathematics

Differential Geometry

10 pages. This is a revised version with a new reference to previous work of Cheeger

Scientific paper

Let (M,g) be a Riemannian manifold with an isometric action of the Lie group G. Let g_G be a left invariant metric on G. Consider the diagonal G action on the product $M \times G$ with the metric g+g_G. In this paper we calculate the formula for the metric h on the quotient space $(M \times G) / G$; the map from g to h is the metric transformation. In particular when g is the hyperbolic metric on H^2 and G=S^1, the transformed metric h is Hamilton's cigar soliton metric studied in the Ricci flow.

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