Title
The ultracenter and central fringe of a graph
Abstract
The central distance of a central vertex v in a connected graph G with rad G < diam G is the largest nonnegative integer n such that whenever n is a vertex with d(v, x) less than or equal to n then x is also a central vertex. The subgraph induced by those central vertices of maximum central distance is the ultracenter of G, The subgraph induced by the central vertices having central distance 0 is the central fringe of G, For a given graph G, the smallest order of a connected graph H is determined whose ultracenter is isomorphic to G but whose center is not G. For a given graph F, we determine the smallest order of a connected graph H whose central fringe is isomorphic to G but whose center is not G. (C) 2001 John Wiley & Sons, Inc.
Year
DOI
Venue
2001
10.1002/net.1021
NETWORKS
Keywords
Field
DocType
distance,center,central vertices,central distance,ultracenter
Combinatorics,Bound graph,Graph power,Vertex (graph theory),Cycle graph,Neighbourhood (graph theory),Distance-hereditary graph,Distance-regular graph,Factor-critical graph,Mathematics
Journal
Volume
Issue
ISSN
38
1
0028-3045
Citations 
PageRank 
References 
0
0.34
1
Authors
3
Name
Order
Citations
PageRank
Gary Chartrand110918.38
Karen S. Novotny200.34
Steven J. Winters3126.33