2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/59799We study in this paper the concept of bounded point evaluations for cyclic operators. We give a negative answer to a question of L.R. Williams {\it Dynamic Systems and Apllications} 3(1994) 103-112. Furthermore, we generalize some results of Williams and give a simple proof of theorem 2.5 of L.R. Williams (The Local Spectra of Pure Quasinormal Operators J. Math. anal. Appl. 187(1994) 842-850) that non normal hyponormal weighted shifts have fat local spectra.44pp, diploma thesisFunctional AnalysisSpectral TheoryPrimary 47A10; Secondary 47B20text