This paper presents a general method to construct Poisson integrators, i.e., integrators that preserve the underlying Poisson geometry. We assume the Poisson manifold is integrable, meaning there is a known local symplectic groupoid for which the Poisson manifold serves as the set of units. Our constructions build upon the correspondence between Poisson diffeomorphisms and Lagrangian bisections, which allows us to reformulate the design of Poisson integrators as solutions to a certain PDE (Hamilton-Jacobi). The main novelty of this work is to understand the Hamilton-Jacobi PDE as an optimization problem, whose solution can be easily approximated using machine learning related techniques. This research direction aligns with the current trend in the PDE and machine learning communities, as initiated by Physics- Informed Neural Networks, advocating for designs that combine both physical modeling (the Hamilton-Jacobi PDE) and data.

该论文提出了一种构建泊松积分器的通用方法，这些积分器能够保持基础泊松几何的特性。通过将泊松微分同胚和拉格朗日子段的对应关系应用于泊松积分器的设计，我们将该方法重新表述为解决某种偏微分方程（Hamilton-Jacobi）的问题。该研究的主要创新在于将Hamilton-Jacobi偏微分方程理解为一种优化问题，其解可以通过机器学习相关技术轻松近似。这一研究方向与当前PDE和机器学习社区的趋势一致，正如物理信息神经网络所提出的，倡导将物理建模（Hamilton-Jacobi偏微分方程）和数据相结合的设计。

通过机器学习设计泊松积分器