Geodesic
A bifurcation theorem for noncoercive integral functionals
Commentationes Mathematicae Universitatis Carolinae, Tome 45 (2004) no. 3, pp. 443-456.

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In this paper we study the existence of critical points for noncoercive functionals, whose principal part has a degenerate coerciveness. A bifurcation result at zero for the associated differential operator is established.
Classification : 35B32, 35B38, 35J20, 47J15, 47J30, 49J10
Keywords: critical points; noncoercive and nondifferentiable functionals; bifurcation \break points 
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     title = {A bifurcation theorem for noncoercive integral functionals},
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Faraci, Francesca. A bifurcation theorem for noncoercive integral functionals. Commentationes Mathematicae Universitatis Carolinae, Tome 45 (2004) no. 3, pp. 443-456. http://geodesic.mathdoc.fr/item/CMUC_2004__45_3_a5/