%0 Journal Article
%T DIFFERENTIABILITY OF THE POPULATION SEMIGROUP<br>人口半群的可微性质
%A ZHANG LIAN-PING
%A <br>张连平
%J 系统科学与数学
%D 1988
%I 
%X In this paper we discuss the property of the population semigroup in terms of propertiesof its infinitesimal generator.we prove that there exists a t_0>0 such that the populationsemigroup {T(t)|>0} is differentiable for t>t_0.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=37F46C35E03B4B86&jid=0CD45CC5E994895A7F41A783D4235EC2&aid=8C0D52C04F7A26F76C2DF739994AD175&yid=0702FE8EC3581E51&vid=5D311CA918CA9A03&iid=0B39A22176CE99FB&sid=7EBE588F611589FC&eid=3E0812ED84A7B31D&journal_id=1000-0577&journal_name=系统科学与数学&referenced_num=0&reference_num=0