Article

Positive Solutions to Semilinear Problems with Coefficient that Changes Sign

u(x) = 0, x є ᶏΩ (1.1) where Ω will be assumed to be a bounded domain in RN with smooth boundary. In this paper we will discuss the existence and non-existence of positive solutions to the problem: -Δu = λa(x) f(u), x є Ω

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