On Spectral Graph Determination

The study of spectral graph determination is a fascinating area of research in spectral graph theory and algebraic combinatorics. This field focuses on examining the spectral characterization of various classes of graphs, developing methods to construct or distinguish cospectral nonisomorphic graphs...

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Main Authors: Igal Sason, Noam Krupnik, Suleiman Hamud, Abraham Berman
Format: Article
Language:English
Published: MDPI AG 2025-02-01
Series:Mathematics
Subjects:
Online Access:https://www.mdpi.com/2227-7390/13/4/549
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author Igal Sason
Noam Krupnik
Suleiman Hamud
Abraham Berman
author_facet Igal Sason
Noam Krupnik
Suleiman Hamud
Abraham Berman
author_sort Igal Sason
collection DOAJ
description The study of spectral graph determination is a fascinating area of research in spectral graph theory and algebraic combinatorics. This field focuses on examining the spectral characterization of various classes of graphs, developing methods to construct or distinguish cospectral nonisomorphic graphs, and analyzing the conditions under which a graph’s spectrum uniquely determines its structure. This paper presents an overview of both classical and recent advancements in these topics, along with newly obtained proofs of some existing results, which offer additional insights.
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spelling doaj-art-9e6a2e8fbcf94cd899cccdf324cb5e8f2025-08-20T03:11:21ZengMDPI AGMathematics2227-73902025-02-0113454910.3390/math13040549On Spectral Graph DeterminationIgal Sason0Noam Krupnik1Suleiman Hamud2Abraham Berman3Department of Electrical and Computer Engineering, Technion—Israel Institute of Technology, Haifa 3200003, IsraelDepartment of Computer Science, Technion—Israel Institute of Technology, Haifa 3200003, IsraelDepartment of Mathematics, Technion—Israel Institute of Technology, Haifa 3200003, IsraelDepartment of Mathematics, Technion—Israel Institute of Technology, Haifa 3200003, IsraelThe study of spectral graph determination is a fascinating area of research in spectral graph theory and algebraic combinatorics. This field focuses on examining the spectral characterization of various classes of graphs, developing methods to construct or distinguish cospectral nonisomorphic graphs, and analyzing the conditions under which a graph’s spectrum uniquely determines its structure. This paper presents an overview of both classical and recent advancements in these topics, along with newly obtained proofs of some existing results, which offer additional insights.https://www.mdpi.com/2227-7390/13/4/549spectral graph theoryspectral graph determinationcospectral nonisomorphic graphsHaemers’ conjectureTurán graphsgraph operations
spellingShingle Igal Sason
Noam Krupnik
Suleiman Hamud
Abraham Berman
On Spectral Graph Determination
Mathematics
spectral graph theory
spectral graph determination
cospectral nonisomorphic graphs
Haemers’ conjecture
Turán graphs
graph operations
title On Spectral Graph Determination
title_full On Spectral Graph Determination
title_fullStr On Spectral Graph Determination
title_full_unstemmed On Spectral Graph Determination
title_short On Spectral Graph Determination
title_sort on spectral graph determination
topic spectral graph theory
spectral graph determination
cospectral nonisomorphic graphs
Haemers’ conjecture
Turán graphs
graph operations
url https://www.mdpi.com/2227-7390/13/4/549
work_keys_str_mv AT igalsason onspectralgraphdetermination
AT noamkrupnik onspectralgraphdetermination
AT suleimanhamud onspectralgraphdetermination
AT abrahamberman onspectralgraphdetermination