A geometric approach to Mather quotient problem

Wei Cheng; Wenxue Wei

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arXiv · 2409.00958

A geometric approach to Mather quotient problem

Wei Cheng·Wenxue Wei

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Abstract

Let $(M,g)$ be a closed, connected and orientable Riemannian manifold with nonnegative Ricci curvature. Consider a Lagrangian $L(x,v):TM\to\R$ defined by $L(x,v):=\frac 12g_x(v,v)-\omega(v)+c$, where $c\in\R$ and $\omega$ is a closed 1-form. From the perspective of differential geometry, we estimate the Laplacian of the weak KAM solution $u$ to the associated Hamilton-Jacobi equation $H(x,du)=c[L]$ in the barrier sense. This analysis enables us to prove that each weak KAM solution $u$ is constant if and only if $\omega$ is a harmonic 1-form. Furthermore, we explore several applications to the Mather quotient and Ma\~n\'e's Lagrangian.

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Wei Cheng, Wenxue Wei. 2024-09-02. A geometric approach to Mather quotient problem. https://arxiv.org/abs/2409.00958

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