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arXiv · 1107.5861

On properly essential classical conformal diffeomorphism groups

Stefan Müller·Peter Spaeth
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Abstract

We prove that various classical conformal diffeomorphism groups, which are known to be essential [1], are in fact properly essential. This is a consequence of a local criterion on a conformal diffeomorphism in the form of a cohomological equation. Furthermore, we study the orbit of a tensor field under the action of the conformal diffeomorphism group for these classical conformal structures. On every closed contact manifold, we find conformal contact forms that are not diffeomorphic.

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Stefan Müller, Peter Spaeth. 2011-07-29. On properly essential classical conformal diffeomorphism groups. https://arxiv.org/abs/1107.5861

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