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 0712.2636math.DG
收藏

两类Dirac流形

Two Categories of Dirac Manifolds

Brett Milburn

摘要:

我们定义了两类Dirac流形,即具有复Dirac结构的流形。映射的第一个概念我称之为\emph{Dirac maps},狄拉克流形的范畴被看作包含泊松流形和复流形的范畴作为满子范畴。第二个概念,\emph{dual-Dirac maps},定义了一个\emph{dual-Dirac category},它包含前辛流形和复流形作为满子范畴。对偶Dirac映射在B-变换下是稳定的。特别地,我们得到了Hitchin广义复流形上范畴的两种结构,即,广义复映射的两个合理概念。我们还进一步推广得到的狄拉克流形的狄拉克结构在于任意精确的柯朗代数胚的类别。作为一个例子,我们考虑的情况下,李群与复杂的狄拉克结构,并建立条件,乘法是狄拉克映射。

英文摘要:

We define two categories of Dirac manifolds, i.e. manifolds with complex Dirac structures. The first notion of maps I call \emph{Dirac maps}, and the category of Dirac manifolds is seen to contain the categories of Poisson and complex manifolds as full subcategories. The second notion, \emph{dual-Dirac maps}, defines a \emph{dual-Dirac category} which contains presymplectic and complex manifolds as full subcategories. The dual-Dirac maps are stable under B-transformations. In particular we get two structures of a category on Hitchin'sgeneralized complex manifolds, i.e., two reasonable notions of generalized complex maps. We also generalize further to get categories of Dirac manifolds for which the Dirac structures lie in arbitrary exact Courant algebroids. As an example, we consider the case of a Lie group with a complex Dirac structure and establish conditions for which multiplication is a Dirac map.

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。

↑