An analytic approach to the spectral characterization of the radical

Graham R. Allan
2008 Studia Mathematica  
We give a simple complex-variable proof of an old result of Zemánek and Le Page on the radical of a Banach algebra. Incidentally, the argument also proves a recent result of Harris and Kadison. 2000 Mathematics Subject Classification: Primary 46H10.
doi:10.4064/sm186-1-2 fatcat:65jttqp2zfgchgh4fquixxr2dm