Removable time-dependent singularities of solutions to the Stokes equations

Removable time-dependent singularities of solutions to the Stokes equations
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斯托克斯方程解的可去除时间相关奇点

DOI:
10.1016/j.jde.2022.10.005
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发表时间:
2023
影响因子:
2.4
通讯作者:
Fumitaka
Fumitaka
中科院分区:
数学2区
文献类型:
--
作者:
Kozono;Hideo and Ushikoshi;Erika and Wakabayashi;Fumitaka

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设Ω <$RN,且当0< α≤ 12时,Ω ∈ C α([0,T]; Ω)。考虑了u= u(x,t)是Stokes方程在Ω 0< t< T(Ω <${t(t)})×{t}中的经典解的情形,即把{Ω(t)} 0< t< T看作u在Ω×(0,T)中的含时奇点.如果u围绕k(t)的行为像|u(x,t)|= 0(|x− t(t)|2− N+(1/α− 2)),则{<$(t)} 0< t< T是u的可去奇点族,这意味着u可以在整个时空Ω×(0,T)中扩张为光滑解.
Abstract Let Ω⊂ R N and let ξ∈ C α ([0, T]; Ω) for 0< α≤ 1 2. We consider the situation that u= u (x, t) is a classical solution of the Stokes equations in⋃ 0< t< T (Ω∖{ξ (t)})×{t}, that is,{ξ (t)} 0< t< T is regarded as the time-dependent singularities of u in Ω×(0, T). If u behaves around ξ (t) like| u (x, t)|= o (| x− ξ (t)| 2− N+(1/α− 2)) as x→ ξ (t) uniformly in t∈(0, T), then {ξ (t)} 0< t< T is a family of removable singularities of u, which implies that u can be extended as a smooth solution in the whole space and time Ω×(0, T).
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DOI: 10.3934/cpaa.2015.14.969
发表时间: 2015
期刊: Commun. Pure Appl. Anal.
影响因子: --
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