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- W4206745366 abstract "In our quest to find a splitter theorem for internally 4-connected binary matroids, we proved in the preceding paper in this series that, except when M or its dual is a cubic Möbius or planar ladder or a certain coextension thereof, an internally 4-connected binary matroid M with an internally 4-connected proper minor N either has a proper internally 4-connected minor M′ with an N-minor such that |E(M)−E(M′)|⩽3 or has, up to duality, a triangle T and an element e of T such that Me has an N-minor and has the property that one side of every 3-separation is a fan with at most four elements. This paper proves that, when we cannot find such a proper internally 4-connected minor M′ of M, we can incorporate the triangle T into one of two substructures of M: a bowtie or an augmented 4-wheel. In the first of these, M has a triangle T′ disjoint from T and a 4-cocircuit D⁎ that contains e and meets T′. In the second, T is one of the triangles in a 4-wheel restriction of M with helpful additional structure." @default.
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- W4206745366 date "2014-01-01" @default.
- W4206745366 modified "2023-09-28" @default.
- W4206745366 title "Towards a splitter theorem for internally 4-connected binary matroids IV" @default.
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- W4206745366 doi "https://doi.org/10.1016/j.aam.2013.09.001" @default.
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