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Liouville results and asymptotics of solutions of a quasilinear elliptic equation with supercritical source gradient term

Abstract : We consider the elliptic quasilinear equation −∆ m u = u p |∇u| q in R N with q ≥ m and p > 0, 1 < m < N. Our main result is a Liouville-type property, namely, all the positive C 1 solutions in R N are constant. We also give their asymptotic behaviour : all the solutions in an exterior domain R N \B r0 are bounded. The solutions in B r0 \ {0} can be extended as a continuous functions in B r0. The solutions in R N \ {0} has a finite limit l ≥ 0 as |x| → ∞. Our main argument is a Bernstein estimate of the gradient of a power of the solution, combined with a precise Osserman's type estimate for the equation satisfied by the gradient.
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https://hal.archives-ouvertes.fr/hal-02919420
Contributor : Marie-Françoise Bidaut-Véron <>
Submitted on : Saturday, August 22, 2020 - 5:39:32 PM
Last modification on : Friday, September 4, 2020 - 3:14:07 AM

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  • HAL Id : hal-02919420, version 1
  • ARXIV : 2008.10220

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Marie-Françoise Bidaut-Veron. Liouville results and asymptotics of solutions of a quasilinear elliptic equation with supercritical source gradient term. 2020. ⟨hal-02919420⟩

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