Geometry of symplectic flux and Lagrangian torus fibrations

Autor:	Shelukhin, Egor, Tonkonog, Dmitry, Vianna, Renato
Rok vydání:	2018
Předmět:	Mathematics - Symplectic Geometry Mathematics - Algebraic Geometry
Druh dokumentu:	Working Paper
Popis:	Symplectic flux measures the areas of cylinders swept in the process of a Lagrangian isotopy. We study flux via a numerical invariant of a Lagrangian submanifold that we define using its Fukaya algebra. The main geometric feature of the invariant is its concavity over isotopies with linear flux. We derive constraints on flux, Weinstein neighbourhood embeddings and holomorphic disk potentials for Gelfand-Cetlin fibres of Fano varieties in terms of their polytopes. We also describe the space of fibres of almost toric fibrations on the complex projective plane up to Hamiltonian isotopy, and provide other applications. Comment: 49 pages, 15 figures; erased Section 8 since it contained a gap, added Section 5.5
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1804.02044 Zobrazit plný text záznamu View this record from Arxiv