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A Lyapunov functional and blow-up results for a class of perturbed semilinear wave equations

We consider in this paper some class of perturbation for the semilinear wave equation with subcritical (in the conformal transform sense) power nonlinearity. We first derive a Lyapunov functional in similarity variables and then use it to derive the blow-up rate. Though the result is similar to the unperturbed case in its statements, this is not the case of our method, which is new up to our knowledge.

preprint2010arXivOpen access
Mohamed-Ali HamzaHatem Zaag
math.AP
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Open access2 authors1 topic
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Mohamed-Ali HamzaHatem Zaag

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