Title
On elements in small cocircuits in minimally k-connected graphs and matroids
Abstract
We give a lower bound on the number of edges meeting some vertex of degree k in terms of the total number of edges in a minimally k-connected graph. This lower bound is tight if k is two or three. The extremal graphs in the case that k =2 are characterized. We also give a lower bound on the number of elements meeting some 2-element cocircuit in terms of the total number of elements in a minimally 2-connected matroid. This lower bound is tight and the extremal matroids are characterized.
Year
DOI
Venue
2002
10.1016/S0012-365X(01)00220-5
Discrete Mathematics
Keywords
Field
DocType
small cocircuits,minimally k-connected graph,lower bound,connected graph
Graph theory,Matroid,Discrete mathematics,Graph,Combinatorics,Vertex (geometry),k-edge-connected graph,Upper and lower bounds,Graphic matroid,Connectivity,Mathematics
Journal
Volume
Issue
ISSN
243
1-3
Discrete Mathematics
Citations 
PageRank 
References 
3
0.49
0
Authors
2
Name
Order
Citations
PageRank
Talmage James Reid14812.18
Haidong Wu2268.43