从辅助矩阵的项恢复图的特征多项式

IF 0.7 4区 数学 Q2 Mathematics Electronic Journal of Linear Algebra Pub Date : 2022-10-28 DOI:10.13001/ela.2022.7231
Alexander Farrugia
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引用次数: 0

摘要

$G$的辅助门矩阵,用$\operatorname{adj}(G)$表示,是矩阵$x\mathbf的辅助门{I}-\其中$\mathbf{A}$是$G$的邻接矩阵。多项式重构问题(PRP)询问图$G$的特征多项式是否总是可以从包含$G$顶点删除子图的$n$特征多项式的多集$\算子名{\mathcal{PD}}(G)$中恢复。注意到$\operatorname{adj}(G)$的$n$对角项正是$\operator name{\mathcal{PD}}{(G。此外,我们根据图的特征多项式来解释$\operatorname{adj}(G)$对角线外的条目,使我们能够求解PRP的版本,该版本利用$\operator name{\mathcal{PD}}{G)$的替代多集,该版本包含与图特征多项式相关的多项式,而不是来自$\operatorname{adj}(G)$的条目。
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Recovering the characteristic polynomial of a graph from entries of the adjugate matrix
The adjugate matrix of $G$, denoted by $\operatorname{adj}(G)$, is the adjugate of the matrix $x\mathbf{I}-\mathbf{A}$, where $\mathbf{A}$ is the adjacency matrix of $G$. The polynomial reconstruction problem (PRP) asks if the characteristic polynomial of a graph $G$ can always be recovered from the multiset $\operatorname{\mathcal{PD}}(G)$ containing the $n$ characteristic polynomials of the vertex-deleted subgraphs of $G$. Noting that the $n$ diagonal entries of $\operatorname{adj}(G)$ are precisely the elements of $\operatorname{\mathcal{PD}}(G)$, we investigate variants of the PRP in which multisets containing entries from $\operatorname{adj}(G)$ successfully reconstruct the characteristic polynomial of $G$. Furthermore, we interpret the entries off the diagonal of $\operatorname{adj}(G)$ in terms of characteristic polynomials of graphs, allowing us to solve versions of the PRP that utilize alternative multisets to $\operatorname{\mathcal{PD}}(G)$ containing polynomials related to characteristic polynomials of graphs, rather than entries from $\operatorname{adj}(G)$.
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来源期刊
CiteScore
1.20
自引率
14.30%
发文量
45
审稿时长
6-12 weeks
期刊介绍: The journal is essentially unlimited by size. Therefore, we have no restrictions on length of articles. Articles are submitted electronically. Refereeing of articles is conventional and of high standards. Posting of articles is immediate following acceptance, processing and final production approval.
期刊最新文献
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