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The Hamiltonian property of the consecutive-3 digraphs. (English) Zbl 0890.05030

A consecutive-\(d\) digraph is a digraph \(G(d,n,q,r)\) whose \(n\) vertices are labelled by the residues modulo \(n\) and a link from vertex \(i\) to vertex \(j\) exists iff \(j\equiv qi+k\pmod n\) for some \(k\) with \(r\leq k\leq r+d- 1\). D.-Z. Du, D. F. Hsu and F. K. Hwang [Math. Comput. Modelling 17, No. 11, 61-63 (1993; Zbl 0789.05040)] conjectured that consecutive-3 digraphs are Hamiltonian. Here the authors show that there exist infinite classes of consecutive-3 digraphs which are not Hamiltonian and others which are Hamiltonian.
Reviewer: M.Hager (Leonberg)

MSC:

05C20 Directed graphs (digraphs), tournaments
05C45 Eulerian and Hamiltonian graphs

Citations:

Zbl 0789.05040
Full Text: DOI

References:

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