论文部分内容阅读
<正> For an integer n≥2,we say that an operator A is an n-idempotent ifA~n=A;A is a generalized n-idempotent if A~n=A~*;A is a hyper-generalized n-iclempotent if A~n=A~+.The set of all n-idempotents,all generalized n-idempotentsand all hyper-generali