通用普吕克正性与章鱼不等式
Universal Plücker positivity and the Octopus inequality
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中文总结 AI 辅助
该研究证明了通用普吕克坐标的正性定理,建立了章鱼不等式与Aldous谱隙猜想的关联,确定了朗斯基行列式相关半直线,并给出超图不等式的普吕克理论证明,回答了相关学者的问题。
中文摘要 AI 辅助
我们证明了当恰好有一个参数为负时,Karp和Purbhoo提出的通用普吕克坐标的正性定理,其尖锐的统一阈值由最大普朗歇尔上转移概率决定。在临界特化情况下,归一化(2,2)坐标的正性等价于章鱼不等式,而章鱼不等式是Aldous谱隙猜想证明中的主要技术工具。通过将该不等式与舒伯特微积分建立关联,这回答了Caputo和Aldous提出的问题。对于具有不同实零点的朗斯基行列式,我们确定了所有分支平衡坐标均为半正定的最大公共半直线。我们还给出了Alon、Kozma和Puder提出的两个超图不等式的普吕克理论证明。
英文摘要
We prove a positivity theorem for the universal Plücker coordinates of Karp and Purbhoo when exactly one parameter is negative, with a sharp uniform threshold governed by the largest Plancherel up-transition probability. At the critical specialisation, positivity of the normalised $(2,2)$-coordinate is equivalent to the Octopus inequality, the main technical tool in the proof of Aldous's spectral gap conjecture. By connecting the inequality with Schubert calculus, this answers questions raised by Caputo and Aldous. For a Wronskian with distinct real zeros, we determine the maximal common half-line on which all branching-balanced coordinates are positive semidefinite. We also give Plücker-theoretic proofs of two hypergraph inequalities of Alon, Kozma, and Puder.
发表机构
- Nanyang Technological University(南洋理工大学)
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