arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2303.09480math.SGmath-phmath.DSmath.MP
收藏

伪全纯哈密顿系统

Pseudo-Holomorphic Hamiltonian Systems

Luiz Frederic Wagner

摘要:

本文首先研究全纯哈密顿系统。特别是,我们定义了这些系统的作用泛函,并表明全纯轨迹服从一个作用原理,即,在某种意义上,它们可以被理解为这些作用泛函的临界点。作为应用,我们利用全纯哈密顿系统建立了Lefschetz纤维化和几乎复曲面纤维化之间的关系.在研究全纯哈密顿系统的作用泛函的过程中,我们观察到对应于全纯哈密顿系统的复结构$J$对某些轨迹的存在性有很强的限制.例如,由于最大值原理,在$\mathbb{C}^{2n}$中不存在以复环面为域的非平凡全纯轨线。为了解除这一限制,我们推广的概念,全纯哈密顿系统的系统不可积殆复结构$J$导致我们的伪全纯哈密顿系统的定义。我们表明,这些系统表现出非常相似的全纯对应的属性,特别是,他们也受到一个行动原则。进一步证明了$J$的可积性等价于“伪全纯辛”形式的闭性。最后,通过考虑全纯哈密顿系统的变形,证明了在四维以外,真伪全纯哈密顿系统的集合在伪全纯哈密顿系统的集合中是开的和稠密的.这意味着真的伪全纯哈密顿系统是通用的。

英文摘要:

In this paper, we first explore holomorphic Hamiltonian systems. In particular, we define action functionals for those systems and show that holomorphic trajectories obey an action principle, i.e., that they can be understood - in some sense - as critical points of these action functionals. As an application, we use holomorphic Hamiltonian systems to establish a relation between Lefschetz fibrations and almost toric fibrations. During the investigation of action functionals for holomorphic Hamiltonian systems, we observe that the complex structure $J$ corresponding to a holomorphic Hamiltonian system poses strong restrictions on the existence of certain trajectories. For instance, no non-trivial holomorphic trajectories with complex tori as domains can exist in $\mathbb{C}^{2n}$ due to the maximum principle. To lift this restriction, we generalize the notion of holomorphic Hamiltonian systems to systems with non-integrable almost complex structures $J$ leading us to the definition of pseudo-holomorphic Hamiltonian systems. We show that these systems exhibit properties very similar to their holomorphic counterparts, notably, that they are also subject to an action principle. Furthermore, we prove that the integrability of $J$ is equivalent to the closedness of the "pseudo-holomorphic symplectic" form. Lastly, we show that, aside from dimension four, the set of proper pseudo-holomorphic Hamiltonian systems is open and dense in the set of pseudo-holomorphic Hamiltonian systems by considering deformations of holomorphic Hamiltonian systems. This implies that proper pseudo-holomorphic Hamiltonian systems are generic.

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。

↑