Existence and uniqueness theorem on weak solutions to the parabolic-elliptic Keller-Segel system
Existence and uniqueness theorem on weak solutions to the parabolic-elliptic Keller-Segel system
复制标题
抛物椭圆Keller-Segel系统弱解的存在唯一性定理
DOI:
10.1016/j.jde.2012.06.001
复制
发表时间:
2012
期刊:
影响因子:
--
通讯作者:
Yahagi,Y.,
中科院分区:
文献类型:
--
作者:
Kozono,H.;Sugiyama,Y.;Yahagi,Y.,
In Rn(n⩾3), we first define a notion of weak solutions to the Keller–Segel system of parabolic–elliptic type in the scaling invariant class Ls(0,T;Lr(Rn)) for 2/s+n/r=2 with n/2<r<n. Any condition on derivatives of solutions is not required at all. The local existence theorem of weak solutions is established for every initial data in Ln/2(Rn). We prove also their uniqueness. As for the marginal case when r=n/2, we show that if n⩾4, then the class C([0,T);Ln/2(Rn)) enables us to obtain the only weak solution.