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arXiv 2004.10662math.QAmath-phmath.MPmath.SG
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Poisson约化的强同伦结构

The Strong Homotopy Structure of Poisson Reduction

Chiara Esposito, Andreas Kraft, Jonas Schnitzer

摘要:

本文提出了一种用$L_\infty$ -态射表示的多重向量场的约化方案。利用约化流形的几何性质,我们对多向量场进行泰勒展开,从而建立了一个合适的DGLA的形变收缩核。我们首先得到了一般DGLA收缩的$L_\infty$ -投影和-包含的显式公式.然后,我们应用这个公式的形变收缩核,我们在既约流形上的多向量场的情况下构建。这使我们能够获得所需的约简$L_\infty$ -态射。最后,我们与其他约简方法进行了比较。

英文摘要:

In this paper we propose a reduction scheme for multivector fields phrased in terms of $L_\infty$-morphisms. Using well-know geometric properties of the reduced manifolds we perform a Taylor expansion of multivector fields, which allows us to built up a suitable deformation retract of DGLA's. We first obtained an explicit formula for the $L_\infty$-Projection and -Inclusion of generic DGLA retracts. We then applied this formula to the deformation retract that we constructed in the case of multivector fields on reduced manifolds. This allows us to obtain the desired reduction $L_\infty$-morphism. Finally, we perfom a comparison with other reduction procedures.

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