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Semilinear fractional elliptic equations involving measures

机译:涉及测度的半线性分数椭圆方程

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摘要

We study the existence of weak solutions to (E) (- ?)~au + g(u) = v in a bounded regular domain Ω in ?~N(N ≥ 2) which vanish in ?~N ?, where (- Δ)~a denotes the fractional Laplacian with a ? (0, 1), ν is a Radon measure and g is a nondecreasing function satisfying some extra hypotheses. When g satisfies a subcritical integrability condition, we prove the existence and uniqueness of weak solution for problem (E) for any measure. In the case where v is a Dirac measure, we characterize the asymptotic behavior of the solution. When g(r) = |r|~(k-1)r with k supercritical, we show that a condition of absolute continuity of the measure with respect to some Bessel capacity is a necessary and sufficient condition in order (E) to be solved.
机译:我们研究(E)(-?)〜au + g(u)= v在?〜N(N≥2)的有界规则域Ω中的弱解的存在性,在?〜N ?中消失,其中( -Δ)〜a表示具有?的分数拉普拉斯算子(0,1),ν是Radon测度,g是满足某些额外假设的不变量函数。当g满足亚临界可积性条件时,我们证明了对于任何度量,问题(E)的弱解的存在性和唯一性。在v是Dirac测度的情况下,我们描述了解的渐近行为。当g(r)= | r |〜(k-1)r且k为超临界时,我们证明,相对于某些贝塞尔容量,该措施的绝对连续性条件是阶数为(E)的充要条件。解决了。

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