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Article
Topological efficiency under graph operations
In this paper we present explicit formulas for computing the topological efficiency index of the most important graph operations such as the Cartesian product, composition, corona, join and hierarchical produc...
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Article
Generalized latin square
LetX be a n-set and letA = [aij] be an xn matrix for whichaij ⊆X, for 1 ≤i, j ≤n. A is called a generalized Latin square onX, if the following conditions is satisfied:
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Article
A new characterization ofA p wherep andp − 2 are primes
Based on the prime graph of a finite simple group, its order is the product of its order components (see [4]). It is known that Suzuki-Ree groups [6],PSL 2(q) [8] andE 8(q) [7] are...
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Article
Minimal generalized permutations
In this paper, we obtain the number of the minimal generalized permutations on a finite set. Also, we determine the minimal generalized permutations on a setX of cardinality less than or equal to 4.