Abstract
A result of Amann-Zehnder type for quasilinear elliptic equations is proved when the origin is a degenerate critical point. For this purpose, the critical groups of the associated continuous functionals are studied. An adaptation of the Generalized Morse Lemma is proved.
Citation
Sergio Lancelotti. "Morse index estimates for continuous functionals associated with quasilinear elliptic equations." Adv. Differential Equations 7 (1) 99 - 128, 2002. https://doi.org/10.57262/ade/1356651877
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