Results 241 to 250 of about 418,956 (263)
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On quasi-strongly regular graphs with parameters (n,k,a;k−1,c2)
Discrete Mathematics, 2021Gengsheng Zhang
exaly
Some Constructions of Quasi-strongly Regular Digraphs
Graphs and Combinatorics, 2021Gengsheng Zhang, Zhang Gengsheng
exaly
Regular and Strongly Regular Selfcomplementary Graphs
1982The graphs given in the title are studied using boolean techniques. First we investigate the change of certain simple graphical parameters (like the number of triangles through a vertex) of a regular self-complementary graphs under a complementing permutation.
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On Strongly -Regular Rings and Strongly Commuting -Regular Rings
Journal of Garmian University, 2017Abdullah Abdul-Jabbar, Lavan Mustafa
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Strongly regular and distance-regular graphs
2016In this chapter, we discuss the basic notions and results from the theory of strongly regular and distance-regular graphs. Emphasis will be on those results that will have implications to the study of point-line geometries. A more extensive treatment of these families of graphs can be found in the books [6, 25, 69, 70].
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On quasi-strongly regular graphs with parameters (n,k,a;k − 2,c2) for a < k − 5
Discrete Mathematics, 2023Gengsheng Zhang
exaly
On the (99,14,1,2) strongly regular graph
1984The existence of a strongly regular graph with parameters as in the title is still in doubt. It is proved that there is no such graph with an automorphism of order 11, and the only primes which could divide the order of the automorphism group of such a graph are 2, 3, 5 and 7.
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There is no (95, 40, 12, 20) strongly regular graph
Journal of Combinatorial Designs, 2020Jernej Azarija, Tilen Marc
exaly
On the second neighbourhoods of quasi-strongly regular graphs
Discrete Mathematics, 2022Gengsheng Zhang
exaly