00872nam0-22002771i-450-990001138650403321000113865FED01000113865(Aleph)000113865FED0100011386520000920d1971----km-y0itay50------baengNumerical Ranges of Operators on Normed Spaces and Elements of Normed Algebrasby Bonsall-Duncan;s.l.Cambridge University Press1971London Mathematical Society lecture note seriesVol.2Bonsall,Frank F.45063Duncan,ITUNINARICAUNIMARCBK990001138650403321C-9-(210125MA1MA1Numerical Ranges of Operators on Normed Spaces and Elements of Normed Algebras344275UNINAING01