Acta mathematica scientia,Series B ›› 2016, Vol. 36 ›› Issue (3): 881-890.doi: 10.1016/S0252-9602(16)30047-9

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FINITE TIME BLOW UP OF THE SOLUTIONS TO BOUSSINESQ EQUATION WITH LINEAR RESTORING FORCE AND ARBITRARY POSITIVE ENERGY

Nikolay KUTEV, Natalia KOLKOVSKA, Milena DIMOVA   

  1. Institute of Mathematics and Informatics, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
  • Received:2015-02-05 Revised:2015-11-18 Online:2016-06-25 Published:2016-06-25
  • Contact: Natalia KOLKOVSKA,E-mail:natali@math.bas.bg E-mail:natali@math.bas.bg
  • Supported by:

    The authors are partially supported by Grant No. DFNI I-02/9 of the Bulgarian Science Fund.

Abstract:

Finite time blow up of the solutions to Boussinesq equation with linear restoring force and combined power nonlinearities is studied. Sufficient conditions on the initial data for nonexistence of global solutions are derived. The results are valid for initial data with arbitrary high positive energy. The proofs are based on the concave method and new sign preserving functionals.

Key words: Boussinesq equation with linear restoring force, finite time blow up, arbitrary high positive energy, combined power nonlinearities, sign preserving functionals

CLC Number: 

  • 35L30
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