Geodesic
2-SYMMETRIC CRITICAL POINT THEOREMS FOR NON-DIFFERENTIABLE FUNCTIONS
Glasgow mathematical journal, Tome 50 (2008) no. 3, pp. 447-466

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DOI

In this paper, some min–max theorems for even and C1 functionals established by Ghoussoub are extended to the case of functionals that are the sum of a locally Lipschitz continuous, even term and a convex, proper, lower semi-continuous, even function. A class of non-smooth functionals admitting an unbounded sequence of critical values is also pointed out.
DOI : 10.1017/S0017089508004333
Mots-clés : 58E05, 49J35 
CANDITO, PASQUALE; LIVREA, ROBERTO; MOTREANU, DUMITRU. 2-SYMMETRIC CRITICAL POINT THEOREMS FOR NON-DIFFERENTIABLE FUNCTIONS. Glasgow mathematical journal, Tome 50 (2008) no. 3, pp. 447-466. doi: 10.1017/S0017089508004333
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     title = {2-SYMMETRIC {CRITICAL} {POINT} {THEOREMS} {FOR} {NON-DIFFERENTIABLE} {FUNCTIONS}},
     journal = {Glasgow mathematical journal},
     pages = {447--466},
     year = {2008},
     volume = {50},
     number = {3},
     doi = {10.1017/S0017089508004333},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089508004333/}
}
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