Excluding Infinite Clique Minors: Volume 566
Neil Robertson · Paul D. Seymour · Robin Thomas
Jan 1995 · American Mathematical Society: Memoirs of the American Mathematical Society Book 566 · American Mathematical Soc.
Ebook
103
Pages
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About this ebook
Two of the authors proved a well-known conjecture of K. Wagner, that in any infinite set of finite graphs there are two graphs so that one is a minor of the other. A key lemma was a theorem about the structure of finite graphs that have no $K_n$ minor for a fixed integer $n$. Here, the authors obtain an infinite analog of this lemma--a structural condition on a graph, necessary and sufficient for it not to contain a $K_n$ minor, for any fixed infinite cardinal $n$.
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