Abstract
In this article, we use Palais-Smale approaches to describe the achieved and nonachieved domains. We characterizes the achieved domain by the existence of a ground state solution for the energy functional $J$ in $\Omega$.
Citation
Huei-li Lin. Hwai-chiuan Wang. Tsung-fang Wu. "A Palais-Smale approach to Sobolev subcritical operators." Topol. Methods Nonlinear Anal. 20 (2) 393 - 407, 2002.
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