00789nam0-22002771i-450-990001006600403321000100660FED01000100660(Aleph)000100660FED0100010066020000920d1969----km-y0itay50------baengIntroduction to Spectral Theory in Hilbert SpaceGilbert HelmbergAmsterdamNorth-Holland1969Analisi funzionaleAlgebre astratte517.00//517.36Helmberg,Gilbert47649ITUNINARICAUNIMARCBK99000100660040332114A-0806596FI1FI1Introduction to Spectral Theory in Hilbert Space354863UNINAING01