3,153 research outputs found

    Chekanov, S

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    Chekanov-Eliashberg dg-algebras for singular Legendrians

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    The Chekanov-Eliashberg dg-algebra is a holomorphic curve invariant associated to Legendrian submanifolds of a contact manifold. We extend the definition to Legendrian embeddings of skeleta of Weinstein manifolds. Via Legendrian surgery, the new definition gives direct proofs of wrapped Floer cohomology push-out diagrams. It also leads to a proof of a conjectured isomorphism between partially wrapped Floer cohomology and Chekanov-Eliashberg dg-algebras with coefficients in chains on the based loop space.Comment: 33 pages, 17 figures, version accepted for publication in J. Symplectic Geo

    Measurement of the Q**2 and energy dependence of the diffractive interactions at HERA

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    Diffractive dissociation of virtual photons, γ∗p → Xp, has been studied in ep interactions with the ZEUS detector at HERA. The data cover photon virtualities 0.17 < Q2 < 0.70 GeV2 and 3 < Q2 <80 GeV2 with 3 < MX < 38 GeV, where MX is the mass of the hadronic final state
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