arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2410.23976math.AP
收藏

关于部分分离调和映射:最优正则性与自由边界的结构

On partially segregated harmonic maps: optimal regularity and structure of the free boundary

Nicola Soave, Susanna Terracini

AI总结:

该研究针对满足部分分离条件的三元密度组的Dirichlet能量极小化问题,证明了极小元的3/4阶Hölder最优正则性、自由边界的结构性质,以及惩罚能量极小解的一致先验界,所用方法包含Almgren型单调性公式、爆破分析与新的Liouville型定理。

摘要:

我们研究在有界域$\Omega\subset \mathbb{R}^N$上,满足部分分离条件$u_1\\,u_2\\,u_3 \equiv 0$(在$\Omega$内)的三元密度组$(u_1,u_2,u_3)$,其极小化Dirichlet能量$\sum_{j=1}^3 \int_\Omega |\nabla u_j|^2\\,dx$。我们证明了极小元在指数为$3/4$的Hölder连续函数空间中具有最优正则性;此外还证明,自由边界是由局部有限个光滑的余维一流形组成的集合,仅余一个Hausdorff维数至多为$N-2$的剩余集。最后,我们证明了惩罚能量$J_\beta(\mathbf{u}, \Omega) = \int_\Omega \sum_{i=1}^3 |\nabla u_i|^2 \\,dx+ \beta\int_\Omega \prod_{j=1}^3 u_j^2\\,dx$的极小解,在指数小于$3/4$的Hölder连续函数空间中具有关于$\beta$一致的先验界。证明过程用到了Almgren型单调性公式、爆破分析以及一些新的Liouville型定理。

英文摘要:

We consider triplets of densities $(u_1,u_2,u_3)$ minimizing the Dirichlet energy \[\sum_{j=1}^3 \int_Ω |\nabla u_j|^2\,dx \] over a bounded domain $Ω\subset \mathbb{R}^N$, subject to the partial segregation condition: \[ u_1\,u_2\,u_3 \equiv 0 \ \text{in $Ω$.} \] We prove optimal regularity of the minimizers in spaces of Hölder continuous functions of exponent $3/4$; furthermore we prove that the free boundary is a collection of a locally finite number of smooth codimension one manifolds up to a residual set of Hausdorff dimension at most $N-2$. Finally we prove uniform-in-$β$ a priori bounds for minimal solutions to the penalized energy: \[ J_β(\mathbf{u}, Ω) = \int_Ω \sum_{i=1}^3 |\nabla u_i|^2 \,dx+ β\int_Ω \prod_{j=1}^3 u_j^2\,dx, \] in spaces of Hölder continuous functions of exponent less than $3/4$. The proofs make use of an Almgren-type monotonicity formula, blow-up analysis together with some new Liouville-type theorems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑