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math.CO2020★ 3 cited
Optimal orientations of vertex-multiplications of cartesian products of graphs
W. H. W. Wong, E. G. Tay
Koh and Tay proved a fundamental classification of vertex-multiplications into three classes and . In this paper, we prove that ve…
math.CO2020
On optimal orientations of complete tripartite graphs
W. H. W. Wong, E. G. Tay
Given a connected and bridgeless graph , let be the family of strong orientations of . The orientation number of is defined to be $\bar{d}(G):=min\{d(D)|…