On the compactness of the Weyl operator in ${\mathcal{S}}_{\ddot{I}}‰$

Vicente Asensio, Chiara Boiti, David Jornet +1

We characterize, using time-frequency analysis, the continuity and compactness of the Weyl operator in global classes of ultradifferentiable functions ${\mathcal{S}}_{\ddot{I}}‰$, for weight…