Partial regularity for subquadratic parabolic systems under controllable growth conditions

Partial regularity for subquadratic parabolic systems under controllable growth conditions
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可控生长条件下次二次抛物线系统的部分正则性

DOI:
10.1016/j.jmaa.2016.02.067
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发表时间:
2016-07
期刊:
J. Math. Anal. Appl.
影响因子:
--
通讯作者:
Chen Shuhong
Chen Shuhong
中科院分区:
其他
文献类型:
--
作者:
Dai Yichen;Tan Zhong;Chen Shuhong

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本文证明了抛物型方程组次二次增长条件∂t u(Z)−div a(z,u,Du)=B(z,u,Du)在z=(x,t)时弱解的正则性结果,其中结构函数a满足标准椭圆性和增长率为2 n n+2<p<2.非齐性B满足可控增长条件|B(z,u,Du)|≤λ(1+|u|p⁎−1+|Du|p(1−1 p⁎)),其中p⁎=(n+2)pn+2−p,如果n+2≠p,这里p⁎可以是n+2=p时的任意指数。
In this paper, we prove a regularity result for weak solutions away from singular set of parabolic systems with subquadratic growth condition of the type∂ t u (z)− div a (z, u, D u)= B (z, u, D u) for z=(x, t), where the structure function a satisfies standard ellipticity and growth condition with polynomial growth rate 2 n n+ 2< p< 2. The inhomogeneity B satisfies the controllable growth condition| B (z, u, D u)|≤ λ (1+| u| p⁎− 1+| D u| p (1− 1 p⁎)), where p⁎=(n+ 2) p n+ 2− p, if n+ 2≠ p. Here p⁎ can be any exponent if n+ 2= p. The proof is based on the A-caloric approximation lemma to parabolic systems with subquadratic growth.
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