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Brambles and independent packings in chordal graphs
Authors:Kathie Cameron
Institution:Department of Mathematics, Wilfrid Laurier University, Waterloo, Ontario, Canada N2L 3C5
Abstract:An independent packing of triangles is a set of pairwise disjoint triangles, no two of which are joined by an edge. A triangle bramble is a set of triangles, every pair of which intersect or are joined by an edge. More generally, I consider independent packings and brambles of any specified connected graphs, not just triangles. I give a min-max theorem for the maximum number of graphs in an independent packing of any family of connected graphs in a chordal graph, and a dual min-max theorem for the maximum number of graphs in a bramble in a chordal graph.
Keywords:Independent packing  Induced matching  Bramble  Chordal graph  Min-max theorem  Independent set  Clique
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