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arxiv: math/0510244 · v3 · submitted 2005-10-12 · 🧮 math.CO

Permutations generated by a stack of depth 2 and an infinite stack in series

classification 🧮 math.CO
keywords stackpermutationsdepthgeneratedinfiniteproveseriesalgorithm
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We prove that the set of permutations generated by a stack of depth two and an infinite stack in series has a basis (defining set of forbidden patterns) consisting of 20 permutations of length 5, 6, 7 and 8. We prove this via a ``canonical'' generating algorithm.

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