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Graph Minors. XVI. Excluding a non-planar graph

, and . Journal of Combinatorial Theory, Series B, 89 (1): 43 - 76 (2003)
DOI: 10.1016/S0095-8956(03)00042-X

Abstract

This paper contains the cornerstone theorem of the series. We study the structure of graphs with no minor isomorphic to a fixed graph L, when L is non-planar. (The case when L is planar was studied in an earlier paper.) We find that every graph with no minor isomorphic to L may be constructed by piecing together in a tree-structure graphs each of which “almost” embeds in some surface in which L cannot be embedded.

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