Almost Full EFX Exists for Four Agents
Almost Full EFX Exists for Four Agents
复制标题
四名特工的 EFX 几乎已满
DOI:
10.1609/aaai.v36i5.20410
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
A. Fiat
中科院分区:
文献类型:
--
作者:
Ben Berger;Avi Cohen;M. Feldman;A. Fiat
The existence of EFX allocations of goods is a major open problem in fair division, even for additive valuations. The current state of the art is that no setting where EFX allocations are impossible is known, and yet, existence results are known only for very restricted settings, such as: (i) agents with identical valuations, (ii) 2 agents, and (iii) 3 agents with additive valuations. It is also known that EFX exists if one can leave n-1 items unallocated, where n is the number of agents.
We develop new techniques that allow us to push the boundaries of the enigmatic EFX problem beyond these known results, and (arguably) to simplify proofs of earlier results. Our main result is that every setting with 4 additive agents admits an EFX allocation that leaves at most a single item unallocated. Beyond our main result, we introduce a new class of valuations, termed nice cancelable, which includes additive, unit-demand, budget-additive and multiplicative valuations, among others. Using our new techniques, we show that both our results and previous results for additive valuations extend to nice cancelable valuations.
DOI:
10.24963/ijcai.2020/4
发表时间:
2020
期刊:
--
影响因子:
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作者:
Amanatidis G
通讯作者:
Amanatidis G
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:
10.1145/3391403.3399511
发表时间:
2020
期刊:
EC '20: Proceedings of the 21st ACM Conference on Economics and Computation
影响因子:
--
作者:
Chaudhury, Bhaskar R.;Garg, Jugal;Mehlhorn, Kurt
通讯作者:
Mehlhorn, Kurt