The Critical Spectrum Of C₀- Semigroup And C Semigroup

The critical spectrum is a new concept in the spectrum mapping theorem and the new concept complete the spectrum mapping theorem. In this paper, by using the feature and the spectrum of semigroups, we discussed the critical spectrum of0C-semigroup and its calculation. Based on the theoris of the critical spectrum of0C-semigroup, we obtained the structure of C semigroup.