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Multiple Critical Points for Indefinite Functionals and Applications

✍ Scribed by Anna Maria Candela; Fabio Giannoni; Antonio Masiello


Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
205 KB
Volume
155
Category
Article
ISSN
0022-0396

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Spectral Flow and Bifurcation of Critica
✍ Patrick M Fitzpatrick; Jacobo Pejsachowicz; Lazaro Recht πŸ“‚ Article πŸ“… 1999 πŸ› Elsevier Science 🌐 English βš– 274 KB

Spectral flow is a well-known homotopy invariant of paths of selfadjoint Fredholm operators. We describe here a new construction of this invariant and prove the following theorem: Let : I\_U Γ„ R be a C 2 function on the product of a real interval I=[a, b] with a neighborhood U of the origin of a rea