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On the number of integral graphs

Article ID Journal Published Year Pages File Type
6416189 Linear Algebra and its Applications 2016 8 Pages PDF
Abstract

We show that at most a 2−cn3/2 proportion of graphs on n vertices have integral spectrum. This improves on previous results of Ahmadi, Alon, Blake, and Shparlinski (2009), who showed that the proportion of such graphs was exponentially small.

Keywords
05C8005C5015B52Graph spectrumRandom matrix
Related Topics
Physical Sciences and Engineering Mathematics Algebra and Number Theory
Preview
On the number of integral graphs
Authors
Kevin P. Costello, Parker Williams,
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Journal
Linear Algebra and its Applications
Journal: Linear Algebra and its Applications
Related Categories
05C80
05C50
15B52
Graph spectrum
Random matrix
Algebra and Number Theory
Analysis
Applied Mathematics
Computational Mathematics
Control and Optimization
Discrete Mathematics and Combinatorics
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Logic
Mathematical Physics
Mathematics (General)
Modelling and Simulation
Numerical Analysis
Statistics and Probability
Theoretical Computer Science
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