Eigenvalue

A spectral characterization of the [Formula presented]-clique extension of the square grid graphs
In this paper we show that for integers [Formula presented], [Formula presented], any co-edge-regular graph which is cospectral with …
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Graphs with two main and two plain eigenvalues
In this note, we study graphs with two main and two plain eigenvalues. Besides some other characterization results, we characterize the …
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A note on graphs with exactly two main eigenvalues
In this note, we consider connected graphs with exactly two main eigenvalues. We will give several constructions for them, and as a …
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Computational results on inertia indices, signature and nullity of C4C8 (R)nanotube
A molecular/chemical graph is hydrogen depleted chemical structure in which vertices denote atoms and edges denote the bonds. …
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On spectrum related topological descriptors of carbon nanocones
The study of spectrum (i.e. multiset of eigenvalues) of graphs especially molecular graphs has found a considerable use in theoretical …
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