Author

Zachary Hanna

Date of Award

2019

Document Type

Thesis

Degree Name

Bachelors

Department

Natural Sciences

First Advisor

Poimenidou, Eirini

Area of Concentration

Mathematics

Abstract

Let G be a graph on n vertices with associated adjacency matrix A(G) and degree matrix D(G). In 2016, Nikiforov defined the matrix Aa(G) = aD(G)+(1-a)A(G) for any real value a E [0; 1]. The collection of the eigenvalues of this matrix alongside their multiplicities is referred to as their Aa- spectrum, and the Aa-spectral properties of graphs has been studied since Nikiforov first introduced the matrix. In this thesis, I introduce some of the work already produced on the subject and begin to examine the relationship this spectrum has with a few graph products.

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