A generalization related to Schrödinger operatorswith a singular potential (Q1607891)

Summary: The purpose of this note is to generalize a result related to the Schrödinger operator \(L= - \Delta + Q\), where \(Q\) is a singular potential. Indeed, we show that \(D(L) = \{0\}\) in \(L^2(\mathbb{R}^d)\) for \(d \geq 4\). This fact answers to an open question that we formulated.