Graph homomorphisms and nodal domains
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Amir Daneshgar; Hossein Hajiabolhassan
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Article
📅
2006
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Elsevier Science
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English
⚖ 137 KB
In this paper, we derive some necessary spectral conditions for the existence of graph homomorphisms in which we also consider some parameters related to the corresponding eigenspaces such as nodal domains. In this approach, we consider the combinatorial Laplacian and co-Laplacian as well as the adj