EFX Exists for Three Agents

EFX Exists for Three Agents
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EFX 存在三个代理

DOI:
10.1145/3391403.3399511
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发表时间:
2020
期刊:
EC '20: Proceedings of the 21st ACM Conference on Economics and Computation
影响因子:
--
通讯作者:
Mehlhorn, Kurt
Mehlhorn, Kurt
中科院分区:
--
文献类型:
--
作者:
Chaudhury, Bhaskar R.;Garg, Jugal;Mehlhorn, Kurt

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研究了一组不可分项目在具有可加性定价的智能体之间公平分配的问题。所考虑的公平概念是对任何项目的嫉妒自由(EFX)。尽管许多研究人员多年来作出了重大努力,但除了两种药剂的简单情况外,EFX分配的存在尚未得到解决。本文建设性地证明了三个agent的EFX分配总是存在的。此外,我们通过展示一个具有三个代理的实例来证伪Caragiannis等人的猜想,其中部分EFX分配(某些项目未分配)具有比任何完全EFX分配更高的纳什福利。
We study the problem of distributing a set of indivisible items among agents with additive valuations in a fairmanner. The fairness notion under consideration is Envy-freeness up to anyitem (EFX). Despite significant efforts by many researchers for several years, the existence of EFX allocations has not been settled beyond the simple case of two agents. In this paper, we show constructively that an EFX allocation always exists for three agents. Furthermore, we falsify the conjecture by Caragiannis et al.[9] by showing an instance with three agents for which there is a partial EFX allocation (some items are not allocated) with higher Nash welfare than that of any complete EFX allocation.
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