2007 | OriginalPaper | Chapter
Nonstandard Palais-Smale conditions
Authors : Natália Martins, Vítor Neves
Published in: The Strength of Nonstandard Analysis
Publisher: Springer Vienna
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We present nonstandard versions of the Palais-Smale condition (PS) below, some of them generalizations, but still sufficient to prove Mountain Pass Theorems, which are quite important in Critical Point Theory.