关于 Banach 空间中线性算子的本性最小模

ON THE ESSENTIAL MINIMUM MODULUS OF LINEAR OPERATORS IN BANACH SPACES

对于 Zemanek[3]所提出的如何把本性最小模的概念推广到 Banach 空间中的算子上去的问题,本文从实例(§2)和一般条件(§3)两个方面作了些探讨。

The problem,how to extend the concept of essentiol Minimum modulusonto operators in Banach spaces,which was suggested in[3]by Zemánek,isdiscussed in the paper from the two sides;examples(§2)and general condi-tions (§3).