44
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2008
15 years 23 days ago
2008
69
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2008
15 years 23 days ago
2008
89
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DM
2008
15 years 23 days ago
2008
One proves that certain numbers occurring in a problem of paths enumeration, studied by Niederhausen in [7] (see also [10]), are top intersection numbers in the cohomology ring of...
90
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DM
2008
15 years 23 days ago
2008
Motivated by a new point of view to study occurrences of consecutive patterns in permutations, we introduce the notion of uniquely k-determined permutations. We give two criteria f...
67
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DM
2008
15 years 23 days ago
2008
For a positive integer k and a graph G, the k-colour graph of G, Ck(G), is the graph that has the proper k-vertex-colourings of G as its vertex set, and two k-colourings are joine...
86
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DM
2008
15 years 23 days ago
2008
The present paper continues the study (begun by Quattrocchi, Colouring 4-cycle systems with specified block colour pattern: the case of embedding P3-designs, Electron. J. Combin.,...
58
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DM
2008
15 years 23 days ago
2008
61
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DM
2008
15 years 23 days ago
2008
By means of an exhaustive computer search we have proved that the strongly regular graphs with parameters (v, k, ,
97
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DM
2008
15 years 23 days ago
2008
In this paper, we provide an upper bound for the k-tuple domination number that generalises known upper bounds for the double and triple domination numbers. We prove that for any ...
DM
2008
15 years 23 days ago
2008
In this paper, we investigate cyclic sequences which contain as elements all k-subsets of {0, 1, . . . , n-1} exactly once such that the unions of any two consecutive k-subsets of...