01018nam0-22003251i-450-9900009643504033210-521-07988-8000096435FED01000096435(Aleph)000096435FED0100009643520000920d1971----km-y0itay50------baengNumerical Ranges of Operators on Normed Spaces and Elements of Normed AlgebrasF.F. Bonsall and J. DuncanLondon [etc.]Cambridge University Press1971London Mathematical Society lecture note series2Analisi funzionaleAlgebre astratte517.00517.36Bonsall,Frank F.45063Duncan,JohnITUNINARICAUNIMARCBK99000096435040332114A-1007608FI1FI1Numerical Ranges of Operators on Normed Spaces and Elements of Normed Algebras344275UNINAING01