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arXiv 1602.03312math.DGmath-phmath.MP
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$\mathbb{Z}_2^n$ -超流形范畴

The category of $\mathbb{Z}_2^n$-supermanifolds

Tiffany Covolo, Janusz Grabowski, Norbert Poncin

摘要:

在物理和数学中,$\mathbb{Z}_2^n$ -分级,$n>1$,出现在各个领域。相应的符号规则由所涉及的$\mathbb{Z}_2^n$ -度的“标量积”确定。$\mathbb{Z}_2^n$ -超几何与经典超几何具有挑战性的差异:非零度偶坐标不是幂零的,偶(分别为,奇数)坐标不一定交换(分别,反交换)成对地。在这篇文章中,我们发展的理论基础:我们定义了$\mathbb{Z}_2^n$ -超流形,并提供了例子,在戴环空间和坐标设置。因此,我们表明,正式系列是适当的替代幂零性。此外,$\mathbb{Z}_2^\bullet$ -超流形类关于切函子和余切函子是闭的。我们解释说,任何$n$倍向量丛有一个典型的“superization”的$\mathbb{Z}_2^n$ -超流形,并证明了基本定理描述supermorphisms的坐标可以扩展到$\mathbb{Z}_2^n$ -上下文。

英文摘要:

In Physics and in Mathematics $\mathbb{Z}_2^n$-gradings, $n>1$, appear in various fields. The corresponding sign rule is determined by the `scalar product' of the involved $\mathbb{Z}_2^n$-degrees. The $\mathbb{Z}_2^n$-Supergeometry exhibits challenging differences with the classical one: nonzero degree even coordinates are not nilpotent, and even (resp., odd) coordinates do not necessarily commute (resp., anticommute) pairwise. In this article we develop the foundations of the theory: we define $\mathbb{Z}_2^n$-supermanifolds and provide examples in the ringed space and coordinate settings. We thus show that formal series are the appropriate substitute for nilpotency. Moreover, the class of $\mathbb{Z}_2^\bullet$-supermanifolds is closed with respect to the tangent and cotangent functors. We explain that any $n$-fold vector bundle has a canonical `superization' to a $\mathbb{Z}_2^n$-supermanifold and prove that the fundamental theorem describing supermorphisms in terms of coordinates can be extended to the $\mathbb{Z}_2^n$-context.

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