Generalizations of Two-stack-sortable Permutations Год выпуска: 2010Автор: Dapeng XuИздательство: LAP Lambert Academic PublishingСтраниц: 64ISBN: 9783838306216Описание This is a dissertation presented to the faculty of department of mathematics, Brandeis University, in partial fulfillment of the requirements for the degree Doctor of Philosophy. In this thesis, we apply the stack sorting operator to r-permutations and construct the functional equation for the generating function of two-stack-sortable permutations counted by descents by using a factorization similar to Zeilberger''s. We solve the functional equation and give explicit formulas for the number of two-stack-sortable permutations.
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GL-7, 21.04 СПАСИБО за всё. Вчера была защита, защитился на 4, хотели сначала даже 5 ставить, но в этом только моя вина. Сказали что сама работа очень не плохая. Ещё раз спасибо!
