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arXiv 2007.03323cs.GT
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Stackelberg肾脏交换问题是$Σ_2^p$ -完成

The Stackelberg Kidney Exchange Problem is $Σ_2^p$-complete

Bart Smeulders, Danny Blom, Frits C. R. Spieksma

摘要:

我们介绍Stackelberg肾脏交换问题。在这个问题中,代理人(例如医院或国家组织)可以控制许多不相容的患者-供体对,这些患者需要移植。代理有机会加入旨在增加可实现的移植的最大总数的协作努力。然而,个体代理只对在其控制下的患者集合内的移植数量最大化感兴趣。然后,问题就变成了哪些病人应该参与合作。我们表明,只要我们允许涉及最多一个固定数量的$K \ge 3$对的交流,回答这个问题是$Σ_2^p$ -完成。然而,当我们仅限于两两交换时,这个问题就可以在多项式时间内得到解决

英文摘要:

We introduce the Stackelberg kidney exchange problem. In this problem, an agent (e.g. a hospital or a national organization) has control over a number of incompatible patient-donor pairs whose patients are in need of a transplant. The agent has the opportunity to join a collaborative effort which aims to increase the maximum total number of transplants that can be realized. However, the individual agent is only interested in maximizing the number of transplants within the set of patients under its control. Then, the question becomes which patients to submit to the collaborative effort. We show that, whenever we allow exchanges involving at most a fixed number $K \ge 3$ pairs, answering this question is $Σ_2^p$-complete. However, when we restrict ourselves to pairwise exchanges only, the problem becomes solvable in polynomial time

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