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arXiv 2005.10054cs.GT
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确定性真实调度问题的一个新下界

A New Lower Bound for Deterministic Truthful Scheduling

Yiannis Giannakopoulos, Alexander Hammerl, Diogo Poças

摘要:

我们研究的问题,如实调度$m$任务$n$自私无关的机器,在目标的最大完工时间最小化,介绍了在开创性的工作Nisan和Ronen [STOC'99]。如何弥补$[2.618,n]$在确定性真实机制逼近比上的不足是算法机制设计领域的一个著名的公开问题。自Christodoulou等人[SODA'07]和Koutsoupias和Vidali [MFCS'07]分别给出$2.414$(用于$n=3$)和$2.618$(用于$n\to\infty$)的下限以来,我们提供了十多年来的首次此类改进。更具体地说,我们表明,目前最好的下限$2.618$可以实现,即使只是$n=4$机器;对于$n=5$,我们已经得到了第一个改进,即$2.711$ ;并允许机器的数量增长任意大,我们可以得到一个下限$2.755$。

英文摘要:

We study the problem of truthfully scheduling $m$ tasks to $n$ selfish unrelated machines, under the objective of makespan minimization, as was introduced in the seminal work of Nisan and Ronen [STOC'99]. Closing the current gap of $[2.618,n]$ on the approximation ratio of deterministic truthful mechanisms is a notorious open problem in the field of algorithmic mechanism design. We provide the first such improvement in more than a decade, since the lower bounds of $2.414$ (for $n=3$) and $2.618$ (for $n\to\infty$) by Christodoulou et al. [SODA'07] and Koutsoupias and Vidali [MFCS'07], respectively. More specifically, we show that the currently best lower bound of $2.618$ can be achieved even for just $n=4$ machines; for $n=5$ we already get the first improvement, namely $2.711$; and allowing the number of machines to grow arbitrarily large we can get a lower bound of $2.755$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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