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A Nine-Element Minor Theorem for 3-Connected Nonbinary Matroids with a W4-Minor
Main manuscript. Computational certificates and verification files are available separately as supplementary material. Let W4W_4 denote the cycle matroid of the four-spoked wheel. Coullard and Oxley asked whether a 3-connected nonbinary matroid with a WnW_n-minor must co
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