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arXiv · 1705.07982

On Central-Peripheral Appendage Numbers of Uniform Central Graphs

Sul-Young Choi·Jonathan Needleman
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Abstract

In a uniform central graph (UCG) the eccentric verticies of a central vertex is the same for all central verticies. This collection of eccentric verticies is the centered periphery. For a pair of graphs $(C, P)$ the central-peripheral appendage number, $A_{ucg}(C, P)$, is the minimum number verticies needed to be adjoined to the graphs $C$ and $P$ in order to construct a uniform central graph H with center C and centered-periphery P. We compute $A_{ucg}(C, P)$ in terms of the radius and diameter of P and whether or not $C$ is a complete graph. In the process we show $A_{ucg}(C, P)\leq 6$ if $diam(P) > 2$. We also provide structure theorems for UCGs in terms of the centered periphery.

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Sul-Young Choi, Jonathan Needleman. 2017-05-22. On Central-Peripheral Appendage Numbers of Uniform Central Graphs. https://arxiv.org/abs/1705.07982

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