Two-Dimensional Diffusion Orthogonal Polynomials Ordered by a Weighted Degree

IF 0.6 4区 数学 Q3 MATHEMATICS Functional Analysis and Its Applications Pub Date : 2024-03-12 DOI:10.1134/s0016266323030036
S. Yu. Orevkov
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Abstract

We study the problem of describing the triples \((\Omega,g,\mu)\), \(\mu=\rho\,dx\), where \(g= (g^{ij}(x))\) is the (co)metric associated with a symmetric second-order differential operator \(\mathbf{L}(f) = \frac{1}{\rho}\sum_{ij} \partial_i (g^{ij} \rho\,\partial_j f)\) defined on a domain \(\Omega\) of \(\mathbb{R}^d\) and such that there exists an orthonormal basis of \(\mathcal{L}^2(\mu)\) consisting of polynomials which are eigenvectors of \(\mathbf{L}\) and this basis is compatible with the filtration of the space of polynomials by some weighted degree.

In a joint paper of D. Bakry, M. Zani, and the author this problem was solved in dimension 2 for the usual degree. In the present paper we solve it still in dimension 2 but for a weighted degree with arbitrary positive weights.

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按加权度排序的二维扩散正交多项式
Abstract We study the problem of describing the triples ((\Omega,g,\mu)), (\mu=\rho\,dx), where \(g= (g^{ij}(x))\) is the (co)metric associated with a symmetric second-order differential operator \(\mathbf{L}(f) = \frac{1}\{rho}\sum_{ij}\partial_i (g^{ij} \rho\、\)定义在\(\mathbb{R}^d\)的域\(\Omega\)上,并且存在一个由多项式组成的\(\mathcal{L}^2(\mu)\)的正交基,这些多项式是\(\mathbf{L}\)的特征向量,并且这个基与多项式空间的某个加权度过滤是兼容的。 在 D. Bakry、M. Zani 和本文作者的一篇联合论文中,这个问题在维度 2 的通常度上得到了解决。在本文中,我们仍在维度 2 中解决了这一问题,但针对的是任意正权重的加权度数。
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来源期刊
CiteScore
0.90
自引率
0.00%
发文量
7
审稿时长
>12 weeks
期刊介绍: Functional Analysis and Its Applications publishes current problems of functional analysis, including representation theory, theory of abstract and functional spaces, theory of operators, spectral theory, theory of operator equations, and the theory of normed rings. The journal also covers the most important applications of functional analysis in mathematics, mechanics, and theoretical physics.
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