Multiple Solutions for Quasilinear Elliptic Neumann Problems in Orlicz-sobolev Spaces
نویسنده
چکیده
Here, Ω is a bounded domain with sufficiently smooth (e.g. Lipschitz) boundary ∂Ω and ∂/∂ν denotes the (outward) normal derivative on ∂Ω. We assume that the function φ :R→R, defined by φ(s)= α(|s|)s if s = 0 and 0 otherwise, is an increasing homeomorphism from R to R. Let Φ(s)= ∫ s 0 φ(t)dt, s∈R. Then Φ is a Young function. We denote by LΦ the Orlicz space associated withΦ and by ‖ · ‖Φ the usual Luxemburg norm on LΦ: ‖u‖Φ = inf { k > 0 : ∫
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