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arXiv 1606.02187math.DGmath.APmath.OAmath.SP
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光滑分布上的拉普拉斯算子

Laplacians on smooth distributions

Yuri A. Kordyukov

摘要:

设$M$是紧致光滑流形,具有正光滑密度$μ$,$H$是光滑分布,具有纤维状内积$g$ .定义了与$(H,μ,g)$相关的Laplacian $Δ_H$,并证明了它在$L^2(M,μ)$中产生一个无界自伴算子.然后,假设$H$生成奇异叶状$\mathcal F$,我们证明了,对于任何函数$φ$从施瓦茨空间$\mathcal S(\mathbb R)$,运营商$φ(Δ_H)$是一个光滑的纵向Sobolev空间的规模与$\mathcal F$。证明是基于伪微分奇异叶理的Androulidakis和Skandalis和次椭圆估计$Δ_H$。

英文摘要:

Let $M$ be a compact smooth manifold equipped with a positive smooth density $μ$ and $H$ be a smooth distribution endowed with a fiberwise inner product $g$. We define the Laplacian $Δ_H$ associated with $(H,μ,g)$ and prove that it gives rise to an unbounded self-adjoint operator in $L^2(M,μ)$. Then, assuming that $H$ generates a singular foliation $\mathcal F$, we prove that, for any function $φ$ from the Schwartz space $\mathcal S(\mathbb R)$, the operator $φ(Δ_H)$ is a smoothing operator in the scale of longitudinal Sobolev spaces associated with $\mathcal F$. The proofs are based on pseudodifferential calculus on singular foliations developed by Androulidakis and Skandalis and subelliptic estimates for $Δ_H$.

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