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math.CO2013
Variations of the spectral excess theorem for normal digraphs
G. R. Omidi
It is known that every distance-regular digraph is connected and normal. An interesting question is: when is a given connected normal digraph distance-regular? Motivated by this qu…
math.CO2013
Ramsey numbers for multiple copies of hypergraphs
Gholam Reza Omidi, Ghaffar raeisi
In this paper, for sufficiently large we determine the Ramsey number where is a -uniform hypergraph with the maximum independent set that intersects each of th…