In this paper we investigate the structure of the subsemigroup generated by the inner automorphisms in . As an application, we give a new point of view to the example of J. Plastiras, which are two -algebras and a satisfying and .
"Some subsemigroups of extensions of -algebras." J. Math. Soc. Japan 56 (2) 561 - 569, April, 2004. https://doi.org/10.2969/jmsj/1191418645