Explicit Cayley covers of Kautz digraphs.
Brunat, Josep M. (2011)
The Electronic Journal of Combinatorics [electronic only]
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Brunat, Josep M. (2011)
The Electronic Journal of Combinatorics [electronic only]
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Dobson, Edward, Kovács, István (2009)
The Electronic Journal of Combinatorics [electronic only]
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Dobson, Edward (2003)
The Electronic Journal of Combinatorics [electronic only]
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Babai, L., Cameron, P.J. (2000)
The Electronic Journal of Combinatorics [electronic only]
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Richard H. Hammack (2013)
Discussiones Mathematicae Graph Theory
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To every graph (or digraph) A, there is an associated automorphism group Aut(A). Frucht’s theorem asserts the converse association; that for any finite group G there is a graph (or digraph) A for which Aut(A) ∼= G. A new operation on digraphs was introduced recently as an aid in solving certain questions regarding cancellation over the direct product of digraphs. Given a digraph A, its factorial A! is certain digraph whose vertex set is the permutations of V (A). The arc set E(A!) forms...
Baskoro, E.T., Miller, M., Širáň, J. (1997)
Acta Mathematica Universitatis Comenianae. New Series
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Dobson, Edward, Morris, Joy (2009)
The Electronic Journal of Combinatorics [electronic only]
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Patricio Ricardo García-Vázquez, César Hernández-Cruz (2017)
Discussiones Mathematicae Graph Theory
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Let D be a digraph with set of vertices V and set of arcs A. We say that D is k-transitive if for every pair of vertices u, v ∈ V, the existence of a uv-path of length k in D implies that (u, v) ∈ A. A 2-transitive digraph is a transitive digraph in the usual sense. A subset N of V is k-independent if for every pair of vertices u, v ∈ N, we have d(u, v), d(v, u) ≥ k; it is l-absorbent if for every u ∈ V N there exists v ∈ N such that d(u, v) ≤ l. A k-kernel of D is a k-independent and...
Ruixia Wang, Shiying Wang (2013)
Discussiones Mathematicae Graph Theory
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A digraph is 3-quasi-transitive (resp. 3-transitive), if for any path x0x1 x2x3 of length 3, x0 and x3 are adjacent (resp. x0 dominates x3). C´esar Hern´andez-Cruz conjectured that if D is a 3-quasi-transitive digraph, then the underlying graph of D, UG(D), admits a 3-transitive orientation. In this paper, we shall prove that the conjecture is true.
Seifter, Norbert, Trofimov, Vladimir I. (2009)
The Electronic Journal of Combinatorics [electronic only]
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César Hernández-Cruz (2013)
Discussiones Mathematicae Graph Theory
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Let D be a digraph, V (D) and A(D) will denote the sets of vertices and arcs of D, respectively. A digraph D is transitive if for every three distinct vertices u, v,w ∈ V (D), (u, v), (v,w) ∈ A(D) implies that (u,w) ∈ A(D). This concept can be generalized as follows: A digraph is k-transitive if for every u, v ∈ V (D), the existence of a uv-directed path of length k in D implies that (u, v) ∈ A(D). A very useful structural characterization of transitive digraphs has been known for a...
Dobson, Edward (2006)
The Electronic Journal of Combinatorics [electronic only]
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