arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1503.01529math.DG
收藏

具有拉格朗日对的Monge-Ampère系统

Monge-Ampère Systems with Lagrangian Pairs

Goo Ishikawa, Yoshinori Machida

摘要:

介绍了Monge-Ampère系统的类别、可分解和双可分解的Monge-Ampère系统,包括非正常仿射球面和常高斯-克罗内克曲率超曲面的方程。基于切触结构中拉格朗日对的存在性,通过明确的拉格朗日切触结构的几何设置来研究它们。我们证明了拉格朗日对是唯一确定的这样一个双可分解系统的顺序,如果自变量的数量$\geq 3$。我们注意到,在三个变量的情况下,每一个双可分解系统是由一个非退化的希钦意义上的三形式。它表明,几类齐次Monge-Ampère系统的拉格朗日对自然出现在各种几何形状。此外,我们还根据几何结构分别建立了可分解和双可分解Monge-Ampère系统的对称维数的上界,并证明了这些估计是精确的(命题4.2和定理5.3).

英文摘要:

The classes of Monge-Ampère systems, decomposable and bi-decomposable Monge-Ampère systems, including equations for improper affine spheres and hypersurfaces of constant Gauss-Kronecker curvature are introduced. They are studied by the clear geometric setting of Lagrangian contact structures, based on the existence of Lagrangian pairs in contact structures. We show that the Lagrangian pair is uniquely determined by such a bi-decomposable system up to the order, if the number of independent variables $\geq 3$. We remark that, in the case of three variables, each bi-decomposable system is generated by a non-degenerate three-form in the sense of Hitchin. It is shown that several classes of homogeneous Monge-Ampère systems with Lagrangian pairs arise naturally in various geometries. Moreover we establish the upper bounds on the symmetry dimensions of decomposable and bi-decomposable Monge-Ampère systems respectively in terms of the geometric structure and we show that these estimates are sharp (Proposition 4.2 and Theorem 5.3).

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。

↑