摘要 : Let be a bounded Lipschitz continuous function which takes values in a sector. We consider the divergence form operator in . We characterize for which the semigroup generated by extends consistently to a contraction -semigroup on ... 展开 Let be a bounded Lipschitz continuous function which takes values in a sector. We consider the divergence form operator in . We characterize for which the semigroup generated by extends consistently to a contraction -semigroup on and for those we characterize when is a core for the generator in L-p(R). 收起