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Symmetric structures in the weak and strong Bruhat orders

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Author(s)
Gao, Yibo
Advisor(s)
Postnikov, Alexander
Date Issued
May 2022
Publisher
Massachusetts Institute of Technology
Abstract
The weak and strong Bruhat orders are classical and rich combinatorial objects, with connections to Schubert calculus, Lie algebras, hyperplane arrangements, sorting networks and so on. In this thesis, we study various new symmetries within these structures, including the balance constant and the hull metric property of the weak order, and the self-dual intervals and boolean elements in the strong order. Much of the work involved is joint with Christian Gaetz.
MIT Department
Massachusetts Institute of Technology. Department of Mathematics
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