Antimaximum principle for elliptic problems with weight

Antimaximum principle for elliptic problems with weight

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This paper is concerned with the antimaximum principle for the linear problem with weight $-Delta u = lambda m(x) u +h(x)$, under Dirichlet or Neumann boundary conditions.We investigate PRO PB7+ the following three questions: Where exactly can this principle hold? If it holds, does it hold uniformly or not? If it Therapeutic Conditioners holds uniformly, what is the exact interval of uniformity? We will in particular obtain a variational characterization of this interval of uniformity.