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arXiv 2007.14692math.DG
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向量丛上齐次算子的李代数

Lie algebra of homogeneous operators of a vector bundle

P. B. A. Lecomte, Elie Zihindula Mushengezi

摘要:

证明了对于向量丛$ E \to M$,由$ E \to M$上的所有微分算子生成的李代数$\mathcal{D}_{\mathcal{E}}(E)$是$L_{\mathcal{E}},$的特征向量,$E,$在欧拉向量场方向上的李导数,而由纤维多项式函数的$\mathbb{R}-$代数$\mathcal{A}(E):= {\rm Pol}(E)$上的Grothendieck构造得到的李代数$\mathcal{D}_G(E)$是同构的.这使得我们可以计算$\mathbb{R}-$代数$\mathcal{A}(E)$的所有导子,并得到$\mathcal{A}(E).$的零权导子的李代数的显式描述

英文摘要:

We prove that for a vector bundle $ E \to M$, the Lie algebra $\mathcal{D}_{\mathcal{E}}(E)$ generated by all differential operators on $E$ which are eigenvectors of $L_{\mathcal{E}},$ the Lie derivative in the direction of the Euler vector field of $E,$ and the Lie algebra $\mathcal{D}_G(E)$ obtained by Grothendieck construction over the $\mathbb{R}-$algebra $\mathcal{A}(E):= {\rm Pol}(E)$ of fiberwise polynomial functions, coincide up an isomorphism. This allows us to compute all the derivations of the $\mathbb{R}-$algebra $\mathcal{A}(E)$ and to obtain an explicit description of the Lie algebra of zero-weight derivations of $\mathcal{A}(E).$

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