half

A characteristic condition of the growth order W_0 of the C_0 semigroup T(t) has been obtained, where W_0=■(Log‖T(t)‖/t)and T(t) be a C_0 semigroup on a Hilbert spac

设T(t)是Hilbert空间H上C_0一半群,本文给出了一个使成立的实数W_0的特征性条件。