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Completing the Structural Analysis of the 2x4 Permutation Classes. (arXiv:1802.00483v1 [math.CO])

来源于:arXiv
We study the structure and enumeration of the final two 2x4 permutation classes, completing a research program that has spanned almost two decades. For both classes, careful structural analysis produces a complicated functional equation. One of these equations is solved with the guess-and-check paradigm, while the other is solved with kernel method-like techniques and Gr\"obner basis calculations. 查看全文>>