Doppelgängers: Bijections of Plane Partitions
Doppelgängers: Bijections of Plane Partitions
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分身:平面分区的双射
DOI:
10.1093/imrn/rny018
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发表时间:
2018
影响因子:
1
通讯作者:
Williams, Nathan
中科院分区:
文献类型:
--
作者:
Hamaker, Zachary;Patrias, Rebecca;Pechenik, Oliver;Williams, Nathan
We say two posets aredoppelgängersif they have the same number ofP-partitions of each heightk. We give a uniform framework for bijective proofs that posets are doppelgängers by synthesizingK-theoretic Schubert calculus techniques of H. Thomas and A. Yong with M. Haiman’s rectification bijection and an observation of R. Proctor. Geometrically, these bijections reflect the rational equivalence of certain subvarieties of minuscule flag manifolds. As a special case, we provide the 1st bijective proof of a 1983 theorem of R. Proctor—that plane partitions of heightkin a rectangle are equinumerous with plane partitions of heightkin a shifted trapezoid.
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