It will be proved that given any noncappable r.e. degree a there are r.e.degrees a0 and a1 such that a0,a1(≤)a and [a0∪a1] is not local distributive,i.e.,ther
In this paper,we discuss on the convergence and approximation of an α-times integrated semigroups. The Trotter-kato theorems for an α-times integrated semigro