## Abstract Threeโdimensional (3โD) porous hydrogels were fabricated by polymerizing 2โhydroxyethyl methacrylate around templates of random closeโpacked poly(methyl methacrylate) microspheres with nominal diameter of 5 or 15 ฮผm. The templates were leached out to create networks of interconnected sp
A characterization of the tight 3-sphere II
โ Scribed by H. Hofer; K. Wysocki; K. Zehnder
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 258 KB
- Volume
- 52
- Category
- Article
- ISSN
- 0010-3640
No coin nor oath required. For personal study only.
โฆ Synopsis
Recall that every closed, oriented, connected 3-manifold M admits a contact form ฮป. We shall give conditions on a periodic orbit P 0 of the Reeb vector field defined by ฮป that allows the construction of an open book decomposition of M \ P 0 into embedded planes asymptotic to P 0 such that P 0 is the binding orbit of the decomposition. It follows that M is the tight 3-sphere. As a by-product, a new dynamical criterion for the tightness of a contact structure is derived in the proof. The results extend earlier results.
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