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超图上的在线随机匹配:稳定性

Online Stochastic Matchings: Stability on Hypergraphs

Fabien Mathieu

arXiv 2607.18935首次发表:更新:

AI 中文总结

研究超图上随机动态匹配的可稳定性,通过到达率和关联矩阵刻画,将简单图相关刻画扩展到任意超边,无需一般位置假设,提出VQML策略可稳定每个可稳定实例,实现最大稳定。

AI 中文摘要

我们研究超图上的随机动态匹配:有限多个类别的物品随时间到达,并通过激活超边在多集中被移除。我们仅根据到达率和关联矩阵来刻画可稳定性,即存在一种匹配策略使队列过程为正常返的情况:(G, $\lambda$) 是可稳定的,当且仅当守恒方程 A$\mu$ = $\lambda$ 有一个非负解,其支撑诱导出一个满射子矩阵,等价地,$\lambda$ 位于由超边生成的锥的内部。这将简单图已知的刻画(非二分性以及独立集不等式)扩展到任意超边,允许有重数和单条边,并且与常数遗憾理论不同,不需要一般位置假设。充分性是构造性的:单个与 $\lambda$ 无关的策略,虚拟队列最长匹配(VQML),它是Nazari和Stolyar的扩展贪婪原始对偶策略的无奖励变体,能稳定每个可稳定实例,因此是最大稳定的。

英文摘要

We study stochastic dynamic matching on hypergraphs: items of finitely many classes arrive over time and are removed in multisets by activating hyperedges. We characterize stabilizability, the existence of a matching policy under which the queue process is positive recurrent, in terms of the arrival rates and the incidence matrix alone: (G, $λ$) is stabilizable if and only if the conservation equation A$μ$ = $λ$ admits a nonnegative solution whose support induces a surjective submatrix, equivalently $λ$ lies in the interior of the cone generated by the hyperedges. This extends a characterization known for simple graphs (non-bipartiteness together with the independent-set inequalities) to arbitrary hyperedges, allowing multiplicities and mono-edges, and, unlike the constant-regret theory, needs no general-position assumption. Sufficiency is constructive: a single $λ$-oblivious policy, Virtual-Queue Match-the-Longest (VQML), a rewardless variant of the Extended Greedy Primal-Dual policy of Nazari and Stolyar, stabilizes every stabilizable instance and is therefore maximally stable. The sufficiency proof requires the positive recurrence of the signed virtual queue underlying VQML; previous analyses invoke this property but, to our knowledge, do not prove it, and supplying it is a second contribution.

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