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Cappello, Chiara: Critically frustrated signed graphs : by Chiara Cappello ; Advisor: Prof. Dr. Eckhard Steffen. Paderborn, 2023
Inhalt
List of Figures
Introduction
Motivation
Signed graphs and balance
Frustration index and criticality
Coloring of signed graphs
Critically frustrated signed graphs
Characterization and families of critical signed graphs
Decomposition and subdivision of critical signed graphs
Characterization of 1- and 2-critical signed graphs
The family of critically 3-frustrated planar signed graphs
The families L and L*
Infinite families of k-critical signed graphs
Construction for non-decomposable critically frustrated signed graphs
The family L*
-K5-minor-free signed graphs
Finiteness of L*(3)
Preliminaries
Proof of Theorem 4.0.1
Structural properties of (, )
Proof of Proposition 4.2.1
Proof of Proposition 4.2.2
Proof of Proposition 4.2.3
Proof of Proposition 4.2.4
The families S and S*
A characterization of S*
Families of signed graphs in S*
The family of S*(3)
Signed graph coloring
The symset t-chromatic number
Brooks' type theorem for the symset t-chromatic number
Symset t-chromatic spectrum
The t-chromatic polynomial
The symset chromatic number
The chromatic spectrum and structural implications
Concluding remarks on variants of coloring parameters of signed graphs
Conclusion and future work
References
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