The characteristic polynomial of a generalized join graph
The characteristic polynomial of a generalized join graph
复制标题
广义连接图的特征多项式
DOI:
10.1016/j.amc.2018.12.013
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发表时间:
2019-05
影响因子:
4
通讯作者:
Chen Haiyan
中科院分区:
文献类型:
--
作者:
Chen Yu;Chen Haiyan
For a graph G with adjacency matrix A (G) and degree-diagonal matrix D (G), Cvetković et al introduced a bivariate polynomial ϕ G (x, t)= d e t (x I−(A (G)− t D (G))), where I is the identity matrix. The polynomial ϕ G (x, t) not only generalizes the characteristic polynomials of some well-known matrices related to G, such as the adjacency, the Laplacian matrices, but also has an elegant combinatorial interpretation as being equivalent to the Bartholdi zeta function. Let G= H [G 1, G 2,…, G k] be the generalized join graph of G 1, G 2,…, G k determined by graph H. In this paper, we first give a decomposition formula for ϕ G (x, t). The decomposition formula provides us a new method to construct infinitely many pairs of non-regular ϕ-cospectral graphs. Then, as applications, explicit expressions for ϕ G (x, t) of some special kinds of graphs are given.
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影响因子:
1.1
作者:
S. Butler
通讯作者:
S. Butler
影响因子:
1.1
作者:
Dongseok Kim;Hye Kyung Kim;Jaeun Lee
通讯作者:
Dongseok Kim;Hye Kyung Kim;Jaeun Lee
DOI:
--
发表时间:
2000-12
期刊:
arXiv: Combinatorics
影响因子:
--
作者:
L. Bartholdi
通讯作者:
L. Bartholdi
影响因子:
1.1
作者:
I. Sato;H. Mitsuhashi;H. Morita
通讯作者:
I. Sato;H. Mitsuhashi;H. Morita
DOI:
10.1142/s1793830914500463
发表时间:
2014-06
期刊:
Discrete Mathematics, Algorithms and Applications
影响因子:
--
作者:
吴宝丰;娄源源;何常香
通讯作者:
何常香