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Orbifold adjunction formula and symplectic cobordisms between lens spaces

Weimin Chen
2004 Geometry and Topology  
Each lens space has a canonical contact structure which lifts to the distribution of complex lines on the three-sphere. In this paper, we show that a symplectic homology cobordism between two lens spaces, which is given with the canonical contact structure on the boundary, must be diffeomorphic to the product of a lens space with the unit interval. As one of the main ingredients in the proof, we also derive in this paper the adjunction and intersection formulae for pseudoholomorphic curves in
more » ... morphic curves in an almost complex 4-orbifold, extending the relevant work of Gromov and McDuff in the manifold setting.
doi:10.2140/gt.2004.8.701 fatcat:ciw2eqqvhrgizfwnqfgeh7ycva