00794nam0-22002651i-450-990001300660403321000130066FED01000130066(Aleph)000130066FED0100013006620000920d1969----km-y0itay50------baengIntroduction to spectral theory in Hilbert spaceby HELMBERG G.Amsterdam [etc.]North-Holland1969North-Holland series in applied mathematics and mechanicsVOLUME 6Helmberg,Gilbert47649ITUNINARICAUNIMARCBK99000130066040332126-I-611587MA1MA1Introduction to Spectral Theory in Hilbert Space354863UNINAING01