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arXiv 0711.2202math.APmath.CA
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具有幂型非线性项的超临界双调和方程

Supercritical biharmonic equations with power-type nonlinearity

Alberto Ferrero, Hans-Christoph Grunau, Paschalis Karageorgis

摘要:

研究了双调和超临界方程$Δ^2u=|u|^{p-1}u$,其中$n>4$和$p>(n+4)/(n-4)$,在整个空间$\mathbb{R}^n$中,以及在单位球中以$λ(1+u)^p$为右手边并附加特征值参数$λ>0$的修正形式,在后一种情况下与Dirichlet边界条件一起.至于整个正规径向解决方案,我们证明振荡行为周围的明确已知的径向{ \it奇异}的解决方案,提供$p\in((n+4)/(n-4),p_c)$,其中$p_c\in ((n+4)/(n-4),\infty]$是一个进一步的临界指数,这是介绍了在最近的工作由Gazzola和第二作者。第三作者已经证明,这些振荡不发生在互补的情况下,其中$p\ge p_c$。关于Dirichlet问题,我们证明了至少存在一个具有相应特征参数的奇异解。此外,对于这个非线性双调和特征值问题的分支图中的极值解,我们证明了只要$p\in((n+4)/(n-4),p_c)$就光滑。

英文摘要:

The biharmonic supercritical equation $Δ^2u=|u|^{p-1}u$, where $n>4$ and $p>(n+4)/(n-4)$, is studied in the whole space $\mathbb{R}^n$ as well as in a modified form with $λ(1+u)^p$ as right-hand-side with an additional eigenvalue parameter $λ>0$ in the unit ball, in the latter case together with Dirichlet boundary conditions. As for entire regular radial solutions we prove oscillatory behaviour around the explicitly known radial {\it singular} solution, provided $p\in((n+4)/(n-4),p_c)$, where $p_c\in ((n+4)/(n-4),\infty]$ is a further critical exponent, which was introduced in a recent work by Gazzola and the second author. The third author proved already that these oscillations do not occur in the complementing case, where $p\ge p_c$. Concerning the Dirichlet problem we prove existence of at least one singular solution with corresponding eigenvalue parameter. Moreover, for the extremal solution in the bifurcation diagram for this nonlinear biharmonic eigenvalue problem, we prove smoothness as long as $p\in((n+4)/(n-4),p_c)$.

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