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arXiv 2404.04488math.AP
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半空间中具有双临界指数的 Neumann 问题正解的存在性

On the existence of positive solution for a Neumann problem with double critical exponents in half-space

Yinbin Deng, Longge Shi

AI总结:

本文利用无 (PS) 条件的山路定理、精细水平估计、改进 Pohozaev 恒等式与 Hardy 不等式,研究半空间中带双临界指数及快速增长权的 Neumann 问题正解存在与不存在性,并在 N=4 时给出参数最佳下界。

摘要:

本文研究半空间中一类具有双临界指数和快速增长权函数的 Neumann 问题正解的存在性与不存在性。该问题与非线性热方程自相似解的研究密切相关。通过应用无 (PS) 条件的 Mountain Pass Theorem(山路定理)以及对山路水平的精细估计,我们在不同假设下获得了正解的存在性。同时,根据参数取值,利用改进的 Pohozaev 恒等式和 Hardy 不等式,也得到了该问题的若干不存在性结果。特别地,当维数 N=4 时,我们给出了该问题正解存在时参数的最佳下界。

英文摘要:

In this paper, we consider the existence and nonexistence of positive solution for a Neumann problem with double critical exponents and fast increasing weighted in half-space. This problem is closely related to the study of self-similar solutions for nonlinear heat equation. By applying the Mountain Pass Theorem without (PS) condition and the delicate estimates for the Mountain Pass level, we obtain the existence of a positive solution under different assumptions. Meanwhile, some nonexistence results for this problem is also obtained by an improved Pohozaev identity and Hardy inequality according to the value of the parameters. Particularly, we give the best lower bound of the parameter for the existence of a positive solution of this problem if dimension N=4.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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