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A smoothing property of Schrödinger equations in the critical case

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Abstract

This paper deals with the critical case of the global smoothing estimates for the Schrödinger equation. Although such estimates fail for critical orders of weights and smoothing, it is shown that they are still valid if one works with operators with symbols vanishing on a certain set. The geometric meaning of this set is clarified in terms of the Hamiltonian flow of the Laplacian. The corresponding critical case of the limiting absorption principle for the resolvent is also established. Obtained results are extended to dispersive equations of Schrödinger type, to hyperbolic equations and to equations of other orders.

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Authors and Affiliations

  1. Department of Mathematics, Imperial College London, 180 Queen's Gate, London, SW7 2BZ, UK

    Michael Ruzhansky

  2. Department of Mathematics, Graduate School of Science, Osaka University, Machikaneyama-cho 1-16, Toyonaka, Osaka, 560-0043, Japan

    Mitsuru Sugimoto

Authors
  1. Michael Ruzhansky
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  2. Mitsuru Sugimoto
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Correspondence to Mitsuru Sugimoto.

Additional information

This work was completed with the aid of ``UK-Japan Joint Project Grant'' by ``The Royal Society'' and ``Japan Society for the Promotion of Science''.

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Ruzhansky, M., Sugimoto, M. A smoothing property of Schrödinger equations in the critical case. Math. Ann. 335, 645–673 (2006). https://doi.org/10.1007/s00208-006-0757-4

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  • DOI: https://doi.org/10.1007/s00208-006-0757-4

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