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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Sketch of the Proof of Theorem A:<br />
Because of (f1), u1 ≡ 0 is a strict local minimum of J, so<br />
dloc(∇J,u1) = 1.<br />
The existence of the two signed-solutions u2 > 0 in Ω and u3 < 0 in Ω is<br />
proved by using the Mountain Pass Theorem. Moreover,<br />
dloc(∇J,u2) = dloc(∇J,u3) = −1, (0.3)<br />
MULTIPLE SOLUTIONS FOR A NONLINEAR DIRICHLET PROBLEM VIA MORSE INDEX – 17➲<br />
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