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2016 Beyond ECH capacities
Michael Hutchings
Geom. Topol. 20(2): 1085-1126 (2016). DOI: 10.2140/gt.2016.20.1085


ECH (embedded contact homology) capacities give obstructions to symplectically embedding one four-dimensional symplectic manifold with boundary into another. These obstructions are known to be sharp when the domain and target are ellipsoids (proved by McDuff), and more generally when the domain is a “concave toric domain” and the target is a “convex toric domain” (proved by Cristofaro-Gardiner). However ECH capacities often do not give sharp obstructions, for example in many cases when the domain is a polydisk. This paper uses more refined information from ECH to give stronger symplectic embedding obstructions when the domain is a polydisk, or more generally a convex toric domain. We use these new obstructions to reprove a result of Hind and Lisi on symplectic embeddings of a polydisk into a ball, and generalize this to obstruct some symplectic embeddings of a polydisk into an ellipsoid. We also obtain a new obstruction to symplectically embedding one polydisk into another, in particular proving the four-dimensional case of a conjecture of Schlenk.


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Michael Hutchings. "Beyond ECH capacities." Geom. Topol. 20 (2) 1085 - 1126, 2016.


Received: 27 October 2014; Revised: 4 April 2015; Accepted: 10 May 2015; Published: 2016
First available in Project Euclid: 16 November 2017

zbMATH: 1338.53119
MathSciNet: MR3493100
Digital Object Identifier: 10.2140/gt.2016.20.1085

Primary: 53D42

Keywords: embedded contact homology , symplectic embeddings

Rights: Copyright © 2016 Mathematical Sciences Publishers


Vol.20 • No. 2 • 2016
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