Some remarks on Schr{\"o}dinger operators

The problem we consider is given a mixed model $F(\gamma) \rightarrow \gamma \rightarrow \tilde{\gamma}$ and a potential $\widehat{V}$ such that $\log \widehat{V} \in L^{1}$, to determine a movement $U$ such that $F(U \gamma)=F(\gamma) + \widehat{V}$.