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 $-Delta Kids Sandals u = lambda m(x) u +h(x)$, under Dirichlet or Neumann boundary conditions.We investigate the following three questions: Where exactly can this principle hold? If it holds, does it hold uniformly or not? If CD Player Parts it holds uniformly, what is the exact interval of uniformity? We will in particular obtain a variational characterization of this interval of uniformity.