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arXiv 1602.03671math.DGmath-phmath.MP
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$\mathbb{Z}_2^n$-超流形的分裂定理

Splitting theorem for $\mathbb{Z}_2^n$-supermanifolds

Tiffany Covolo, Janusz Grabowski, Norbert Poncin

摘要:

光滑$\mathbb{Z}_2^n$-超流形是近年来提出并研究的一类流形。相应的符号规则由所涉及的$\mathbb{Z}_2^n$-度的"标量积"给出。与使用全次数的奇偶性的符号规则相比,它表现出有趣的变化。利用新规则,非零度偶坐标不是幂零的,并且偶(分别为,奇数)坐标不一定交换(分别,反交换)成对地。经典的巴彻勒-高塞茨基定理说,任何光滑的超流形都是向量丛$E$的"超化" $ΠE$的同构。我们也知道这个结果在复解析范畴中是失败的。因此,很自然地要问,在局部模型由形式幂级数构成的$\mathbb{Z}_2^n$-超流形范畴中,是否也有类似的说法。我们对这个问题给予肯定的回答。

英文摘要:

Smooth $\mathbb{Z}_2^n$-supermanifolds have been introduced and studied recently. The corresponding sign rule is given by the "scalar product" of the involved $\mathbb{Z}_2^n$-degrees. It exhibits interesting changes in comparison with the sign rule using the parity of the total degree. With the new rule, nonzero degree even coordinates are not nilpotent, and even (resp., odd) coordinates do not necessarily commute (resp., anticommute) pairwise. The classical Batchelor-Gawcedzki theorem says that any smooth supermanifold is diffeomorphic to the "superization" $ΠE$ of a vector bundle $E$. It is also known that this result fails in the complex analytic category. Hence, it is natural to ask whether an analogous statement goes through in the category of $\mathbb{Z}_2^n$-supermanifolds with its local model made of formal power series. We give a positive answer to this question.

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