单调 Hopf-调和映射的解析刻画
Analytic characterization of monotone Hopf-harmonics
AI总结:
本文研究平面上与 Dirichlet 能量相关的内变分方程的解,证明其单调性当且仅当 Jacobi 行列式不变号,并指出这类单调 Hopf-调和映射是调和同胚的自然替代方案。
摘要:
我们研究在给定同胚 Sobolev 边界数据下,平面上与 Dirichlet 能量相关的内变分方程的解。我们证明,此类解为单调的当且仅当其 Jacobi 行列式不变号。这些被称为单调 Hopf-调和映射的解,是调和同胚的自然替代方案。考察解(非先验单调)在 Hopf 二次微分轨迹上的拓扑行为,在我们的论证中起着重要作用。
英文摘要:
We study solutions of the inner-variational equation associated with the Dirichlet energy in the plane, given homeomorphic Sobolev boundary data. We prove that such a solution is monotone if and only if its Jacobian determinant does not change sign. These solutions, called monotone Hopf-harmonics, are a natural alternative to harmonic homeomorphisms. Examining the topological behavior of a solution (not a priori monotone) on the trajectories of Hopf quadratic differentials plays a sizable role in our arguments.
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