Determinant of graphs joined by two edges

In this paper we develop a technique to calculate the determinant of the adjacency matrix of a graph that is formed by joining two distinct simple graphs by two additional edges. The choice of the vertices at which the connection is established is an arbitrary and naturally the result is a function...

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Bibliographic Details
Main Authors: Sookyang S., Arworn S., Gyurov B.
Format: Article
Language:English
Published: 2014
Online Access:http://www.scopus.com/inward/record.url?eid=2-s2.0-84864138938&partnerID=40&md5=d01a999d6eb9ee4b13390ebd4dc76db8
http://cmuir.cmu.ac.th/handle/6653943832/6814
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Institution: Chiang Mai University
Language: English
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Summary:In this paper we develop a technique to calculate the determinant of the adjacency matrix of a graph that is formed by joining two distinct simple graphs by two additional edges. The choice of the vertices at which the connection is established is an arbitrary and naturally the result is a function of the choice, so the technique is useful when the joined graphs are of special types - regular, strongly regular, complete graphs, wheel graphs, paths. In the second half of the paper we apply the technique to find the determinant of cycles joined by two edges and complete graphs joined by two edges. © 2012 by the Mathematical Association of Thailand. All rights reserved.