Extension of Additive Valuations to General Valuations on the Existence of EFX
Extension of Additive Valuations to General Valuations on the Existence of EFX
复制标题
将附加估值扩展到对 EFX 存在的一般估值
DOI:
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发表时间:
2021
期刊:
影响因子:
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通讯作者:
Ryoga Mahara
中科院分区:
文献类型:
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作者:
Ryoga Mahara
Envy freeness is one of the most widely studied notions in fair division. Because envy-free allocations do not always exist when items are indivisible, several relaxations have been considered. Among them, possibly the most compelling notion is envy freeness up to any item (EFX). Informally speaking, EFX requires that no agent i envies another agent j after the removal of any item in j’s bundle. The existence of EFX allocations is a major open problem. We study the existence of EFX allocations when agents have general valuations. For general valuations, it is known that an EFX allocation always exists (i) when n = 2 or (ii) when all agents have identical valuations, where n is the number of agents. It is also known that an EFX allocation always exists when one can leave at most n − 1 items unallocated. We develop new techniques and extend some results of additive valuations to general valuations on the existence of EFX allocations. We show that an EFX allocation always exists (i) when all agents have one of two general valuations or (ii) when the number of items is at most n + 3. We also show that an EFX allocation always exists when one can leave at most n − 2 items unallocated. In addition to the positive results, we construct an instance with n = 3, in which an existing approach does not work. Funding: This work was partially supported by Kyoto University and Toyota Motor Corporation [Joint Project “Advanced Mathematical Science for Mobility Society”].
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DOI:
10.24963/ijcai.2020/4
发表时间:
2020
期刊:
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影响因子:
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作者:
Amanatidis G
通讯作者:
Amanatidis G
DOI:
10.1145/3391403.3399526
发表时间:
2019-02
期刊:
Proceedings of the 21st ACM Conference on Economics and Computation
影响因子:
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作者:
J. Garg;Setareh Taki
通讯作者:
J. Garg;Setareh Taki
DOI:
10.1145/3465456.3467605
发表时间:
2021
期刊:
Proceedings of the 22nd ACM Conference on Economics and Computation (EC
影响因子:
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作者:
Chaudhury, Bhaskar Ray;Garg, Jugal;Mehlhorn, Kurt;Mehta, Ruta;Misra, Pranabendu
通讯作者:
Misra, Pranabendu
DOI:
10.1109/focs52979.2021.00012
发表时间:
2022
期刊:
2021 IEEE 62nd Annual Symposium on Foundations of Computer Science (FOCS
影响因子:
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作者:
Li, Wenzheng;Vondrak, Jan
通讯作者:
Vondrak, Jan