00926nam0-22003131i-450-990001436090403321000143609FED01000143609(Aleph)000143609FED0100014360920000920d1969----km-y0itay50------baengIntroduction to Spectral Theory in Hilbert Spaceby Gilbert HelmbergAmsterdam [etc.]North-Holland1969xiii, 346 p.29 cmNorth-Holland series in applied mathematics and mechanics6D.F.Analisi funzionaleAlgebre astratte517.00-36Helmberg,Gilbert47649ITUNINARICAUNIMARCBK990001436090403321S.14A-038FI1FI1Introduction to Spectral Theory in Hilbert Space354863UNINAING01