Displaceability and the mean Euler characteristic

Urs Frauenfelder, Felix Schlenk, Otto van Koert
2012 Kyoto Journal of Mathematics  
In this note we show that the mean Euler characteristic of equivariant symplectic homology is an effective obstruction against the existence of displaceable exact contact embeddings. As an application we show that certain Brieskorn manifolds do not admit displaceable exact contact embeddings.
doi:10.1215/21562261-1728866 fatcat:ginppiersvez3d7pm7u4pmwzhi