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On the radius of spatial analyticity for the modified Kawahara equation on the line

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  • Gerson Petronilho
  • Priscila Leal da Silva

Abstract

First, by using linear and trilinear estimates in Bourgain type analytic and Gevrey spaces, the local well‐posedness of the Cauchy problem for the modified Kawahara equation on the line is established for analytic initial data u0(x) that can be extended as holomorphic functions in a strip around the x‐axis. Next we use this local result and a Gevrey approximate conservation law to prove that global solutions exist. Furthermore, we obtain explicit lower bounds for the radius of spatial analyticity r(t) given by r(t)≥ct−(4+δ), where δ>0 can be taken arbitrarily small and c is a positive constant.

Suggested Citation

  • Gerson Petronilho & Priscila Leal da Silva, 2019. "On the radius of spatial analyticity for the modified Kawahara equation on the line," Mathematische Nachrichten, Wiley Blackwell, vol. 292(9), pages 2032-2047, September.
    • Handle: RePEc:bla:mathna:v:292:y:2019:i:9:p:2032-2047
    DOI: 10.1002/mana.201800394
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