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Multiple Solutions for a Nonlinear Dirichlet Problem via - Mathematics

Multiple Solutions for a Nonlinear Dirichlet Problem via - Mathematics

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Let λ1,λ2,λ3,... be the sequence of eigenvalues of −Δ in Ω with zero<br />

<strong>Dirichlet</strong> boundary condition.<br />

As it is well known, to solve (0.1) is equivalent to find critical points of the<br />

functional J : H 1 0<br />

where F(ξ) = � ξ<br />

0<br />

(Ω) → R defined by<br />

� �<br />

1<br />

J(u) =<br />

2 |∇u|2 �<br />

− F(u)<br />

f (s) ds.<br />

Ω<br />

MULTIPLE SOLUTIONS FOR A NONLINEAR DIRICHLET PROBLEM VIA MORSE INDEX – 5➲<br />

dx, (0.2)<br />

▲ ▲<br />

➲ ❏ ✘

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