Document Type
Article
Version
Author's Final Manuscript
Publication Title
Selecta Mathematica
Publication Date
2016
Abstract
To investigate the rigidity and flexibility of Lagrangian cobordisms between Legendrian submanifolds, we study the minimal length of such a cobordism, which is a 1-dimensional measurement of the non-cylindrical portion of the cobordism. Our primary tool is a set of real-valued capacities for a Legendrian submanifold, which are derived from a filtered version of Legendrian contact homology. Relationships between capacities of Legendrians at the ends of a Lagrangian cobordism yield lower bounds on the length of the cobordism. We apply the capacities to Lagrangian cobordisms realizing vertical dilations (which may be arbitrarily short) and contractions (whose lengths are bounded below). We also study the interaction between length and the linking of multiple cobordisms as well as the lengths of cobordisms derived from non-trivial loops of Legendrian isotopies.
Publisher's Statement
© Springer International Publishing 2016. This is the author's final manuscript. The publisher's version can be found here: http://doi.org/10.1007/s00029-016-0288-0
Citation
Sabloff, J.M. and L. Trainer. "The Minimal Length of the Lagrangian Cobordism Between Legendrians." Selecta Mathematica (2016): 1-30.
DOI
http://doi.org/10.1007/s00029-016-0288-0