Pseudodifferential operators serve as a pivotal extension of classical differential operators by incorporating non-local features through their symbols. These operators are fundamental in the analysis ...
Complex symmetric operators have attracted significant attention in recent years owing to their intriguing spectral properties and the elegance of their underlying mathematical structures. At their ...
Quasi-normal modes, namely the complex frequencies encoding the linear response of resonators under tiny perturbations, have acquired major importance in recent years in different settings of physics, ...
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