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    • A well-posedness result for hyperbolic operators with Zygmund coefficients 

      Colombini F.; del Santo D.; Fanelli F.; Métivier G. (Journal des Mathematiques Pures et Appliquees, 2013-12-31)
      In this paper we prove an energy estimate with no loss of derivatives for a strictly hyperbolic operator with Zygmund continuous second order coefficients both in time and in space. In particular, this estimate implies the ...