A characterization of -closed graphs
Pavol Híc (1989)
Mathematica Slovaca
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Pavol Híc (1989)
Mathematica Slovaca
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Al-Addasi, Salah, Al-Ezeh, Hasan (2008)
International Journal of Mathematics and Mathematical Sciences
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Jaroslav Ivančo, Tatiana Polláková (2014)
Discussiones Mathematicae Graph Theory
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A graph is called supermagic if it admits a labeling of the edges by pairwise different consecutive integers such that the sum of the labels of the edges incident with a vertex is independent of the particular vertex. In this paper we establish some conditions for graphs with a saturated vertex to be supermagic. Inter alia we show that complete multipartite graphs K1,n,n and K1,2,...,2 are supermagic.
Gurusamy Rengasamy Vijayakumar (2013)
Discussiones Mathematicae Graph Theory
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The infimum of the least eigenvalues of all finite induced subgraphs of an infinite graph is defined to be its least eigenvalue. In [P.J. Cameron, J.M. Goethals, J.J. Seidel and E.E. Shult, Line graphs, root systems, and elliptic geometry, J. Algebra 43 (1976) 305-327], the class of all finite graphs whose least eigenvalues ≥ −2 has been classified: (1) If a (finite) graph is connected and its least eigenvalue is at least −2, then either it is a generalized line graph or it is represented...
Filip Guldan (1987)
Časopis pro pěstování matematiky
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