数学物理学报(英文版) ›› 2025, Vol. 45 ›› Issue (5): 2135-2141.doi: 10.1007/s10473-025-0517-8

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A NOTE FOR $W^{1,P}(V)$ AND $W_{0}^{1,P}(V)$ ON A LOCALLY FINITE GRAPH

Yulu TIAN*, Liang ZHAO   

  1. School of Mathematical Sciences Key Laboratory of Mathematics and Complex Systems of MOE, Beijing Normal University, Beijing 100875, China
  • 收稿日期:2024-02-21 出版日期:2025-09-25 发布日期:2025-10-14

A NOTE FOR $W^{1,P}(V)$ AND $W_{0}^{1,P}(V)$ ON A LOCALLY FINITE GRAPH

Yulu TIAN*, Liang ZHAO   

  1. School of Mathematical Sciences Key Laboratory of Mathematics and Complex Systems of MOE, Beijing Normal University, Beijing 100875, China
  • Received:2024-02-21 Online:2025-09-25 Published:2025-10-14
  • Contact: *Yulu Tian, E-mail: tianyl@mail.bnu.edu.cn
  • About author:Liang Zhao, E-mail: liangzhao@bnu.edu.cn
  • Supported by:
    Tian's research was supported by the National Key R and D Program of China (2020YFA0713100), the National Natural Science Foundation of China (12271039) and the Open Project Program (K202303) of Key Laboratory of Mathematics and Complex Systems, Beijing Normal University.

摘要: In this paper, we investigate the Sobolev spaces $W^{1,p}(V)$ and $W_{0}^{1,p}(V)$ on a locally finite graph $G=(V,E)$, which are fundamental tools when we apply the variational methods to partial differential equations on graphs. As a key contribution of this note, we show that in general, $W^{1,p}(V)\neq W_0^{1,p}(V)$ on locally finite graphs, which is different from the situation on Euclidean space $\mathbb{R}^N$.

关键词: Sobolev space, locally finite graph, Cheeger constant

Abstract: In this paper, we investigate the Sobolev spaces $W^{1,p}(V)$ and $W_{0}^{1,p}(V)$ on a locally finite graph $G=(V,E)$, which are fundamental tools when we apply the variational methods to partial differential equations on graphs. As a key contribution of this note, we show that in general, $W^{1,p}(V)\neq W_0^{1,p}(V)$ on locally finite graphs, which is different from the situation on Euclidean space $\mathbb{R}^N$.

Key words: Sobolev space, locally finite graph, Cheeger constant

中图分类号: 

  • 46E39