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arXiv · 1403.7649

Rainbow eulerian multidigraphs and the product of cycles

Susana-Clara López·Francesc-Antoni Muntaner-Batle
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Abstract

An arc colored eulerian multidigraph with $l$ colors is rainbow eulerian if there is an eulerian circuit in which a sequence of $l$ colors repeats. The digraph product that refers the title was introduced by Figueroa-Centeno et al. as follows: let $D$ be a digraph and let $Γ$ be a family of digraphs such that $V(F)=V$ for every $F\in Γ$. Consider any function $h:E(D)\longrightarrowΓ$. Then the product $D\otimes_{h} Γ$ is the digraph with vertex set $V(D)\times V$ and $((a,x),(b,y))\in E(D\otimes_{h}Γ)$ if and only if $ (a,b)\in E(D)$ and $ (x,y)\in E(h (a,b))$. In this paper we use rainbow eulerian multidigraphs and permutations as a way to characterize the $\otimes_h$-product of oriented cycles. We study the behavior of the $\otimes_h$-product when applied to digraphs with unicyclic components. The results obtained allow us to get edge-magic labelings of graphs formed by the union of unicyclic components and with different magic sums.

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Susana-Clara López, Francesc-Antoni Muntaner-Batle. 2014-03-29. Rainbow eulerian multidigraphs and the product of cycles. https://arxiv.org/abs/1403.7649

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