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Symmetric Digraphs from Powers Modulo <i>n</i>
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Open Journal of Discrete Mathematics·Volume 01 (2011)·Pages 103–107·Published 28 October 2011·DOI10.4236/ojdm.2011.13013
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Abstract
For each pair of positive integers <i>n</i> and <i>k</i>, let G(n,k) denote the digraph whose set of vertices is <i>H</i> = {0,1,2,···, <i>n</i> – 1} and there is a directed edge from <i>a</i> ∈ <i>H</i> to <i>b</i> ∈ <i>H</i> if <i>a</i> ≡ <i>b</i>(mod n). The digraph <i>G</i>(<i>n</i>,<i>k</i>) is symmetric if its connected component can be partitioned into isomorphic pairs. In this paper we obtain all symmetric <i>G</i>(<i>n</i>,<i>k</i>)
KeywordsCongruenceDigraphComponentHeightCycle
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