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 ● Pagine 103 ● ISBN 9781470401450 ● Casa editrice American Mathematical Society ● Scaricabile 3 volte ● Moneta EUR ● ID 6612765 ● Protezione dalla copia Adobe DRM
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