A note on independence complexes of chordal graphs and dismantling

ELECTRONIC JOURNAL OF COMBINATORICS(2017)

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摘要
We show that the independence complex of a chordal graph is contractible if and only if this complex is dismantlable (strong collapsible) and it is homotopy equivalent to a sphere if and only if its core is a cross-polytopal sphere. The proof uses the properties of tree models of chordal graphs.
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关键词
chordal graph,independence complex,dismantling,strong collapsibility,cop-win graph
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