期刊
MATHEMATISCHE NACHRICHTEN
卷 279, 期 12, 页码 1267-1288出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mana.200410420
关键词
critical point theory; strongly indefinite functionals; gage spaces
类别
Let E be a Banach space and Phi : E -> R a C-1-functional. Let P be a family of semi-norms on E which separates points and generates a (possibly non-metrizable) topology T-p on E weaker than the norm topology. This is a special case of a gage space, that is, a topological space where the topology is generated by a family of semi-metrics. We develop some critical point theory for Phi : (E, P) -> R. In particular, we prove deformation lemmas where the deformations are continuous with respect to T-p. In applications this yields a gain in compactness when Phi does not satisfy the Palais-Smale condition because one can work with the weak topology. We also prove some foundational results on gage spaces. In particular, we introduce the concept of Lipschitz continuity in this setting and prove the existence of Lipschitz continuous partitions of unity. (c) 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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