Multiple Solutions for a Nonlinear Dirichlet Problem via - Mathematics
Multiple Solutions for a Nonlinear Dirichlet Problem via - Mathematics
Multiple Solutions for a Nonlinear Dirichlet Problem via - Mathematics
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Throughout this paper we assume f satisfies the following hypotheses:<br />
(f1) f (0) = 0 and f ′ (0) < λ1,<br />
(f2) f ′ (∞) ∈ (λk,λk+1),<br />
(f3) There is a constant γ such that f ′ (t) ≤ γ < λk+1 <strong>for</strong> every t ∈ R.<br />
Under these conditions that we are assuming on f , J ∈ C 2 .<br />
We recall that if u is a critical point of J and there exists a maximal<br />
integer q such that D 2 J(u) is negative definite on some q-dimensional<br />
subspace then the Morse index m(u,J) of u is q.<br />
MULTIPLE SOLUTIONS FOR A NONLINEAR DIRICHLET PROBLEM VIA MORSE INDEX – 7➲<br />
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