Abstract

We investigate the asymptotic behaviour of the localized solitarywaves for the generalized Kadomtsev-Petviashvili equations. Inparticular, we compute their first order asymptotics in anydimension $N \geq 2$.

Highlights

  • 1.1 Motivation and main resultsThe present paper deals with the solitary waves for the generalised Kadomtsev-Petviashvili equations∂tu + up∂1u + ∂13u − N ∂j uj = 0, ∀j ∈ j=2{2, . . . , N }, ∂1uj = ∂ju. (1)

  • Theorem 1 is optimal for any non-trivial solitary wave when m is an odd number

  • There is only one possible asymptotics for all the solitary waves with the same energy. This seems to be a further evidence of the uniqueness of non-trivial solitary waves in the case of the standard Kadomtsev-Petviashvili equation: we believe that this new evidence could be a useful step towards the resolution of this problem, which is still open to our knowledge

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Summary

Motivation and main results

Theorem 1 is optimal for any non-trivial solitary wave when m is an odd number (which holds for the standard Kadomtsev-Petviashvili equation). There may be non-trivial solitary waves whose decay rate is higher than r−N This may happen if the function v∞ is identically equal to 0, that is if v(x)p+1dx = 0. There is only one possible asymptotics for all the solitary waves with the same energy This seems to be a further evidence of the uniqueness of non-trivial solitary waves (up to translations) in the case of the standard Kadomtsev-Petviashvili equation: we believe that this new evidence could be a useful step towards the resolution of this problem, which is still open to our knowledge

Sketch of the proof of Theorem 1
Convolution equations
Main properties of the kernels
Decay properties of the solitary waves
Asymptotics of the solitary waves
Plan of the paper
Integral representations of some classes of tempered distributions
Pointwise limit at infinity of the kernel K0
R after the
Rigorous derivation of the convolution equations
Algebraic decay of the solitary waves

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