Browsing by Author "Cortes, V. H."
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- ItemAbsence of point spectrum for unitary operators(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2008) Astaburuaga, M. A.; Bourget, O.; Cortes, V. H.; Fernandez, C.Let us consider the time-dependent Schrodinger equation,
- ItemSpectral properties for perturbations of unitary operators(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2011) Astaburuaga, M. A.; Cortes, V. H.Consider a unitary operator U-0 acting on a complex separable Hilbert space H. In this paper we study spectral properties for perturbations of U-0 of the type,