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
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Formato PDF ● Páginas 103 ● ISBN 9781470401450 ● Editora American Mathematical Society ● Carregável 3 vezes ● Moeda EUR ● ID 6612765 ● Proteção contra cópia Adobe DRM
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