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arXiv 2005.10101cs.GT
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加权拥塞对策的统一近似势

A Unifying Approximate Potential for Weighted Congestion Games

Yiannis Giannakopoulos, Diogo Poças

摘要:

我们提供了一个统一的,黑箱工具,建立存在的近似均衡加权拥塞游戏,并在同一时间,他们的价格稳定的边界。我们的框架可以处理资源的一般成本-包括,特别是,减少的-和制定的一组参数,这是通过成本函数的基本分析性质确定的。我们证明了我们的工具的力量,通过应用它来恢复最近的结果Caragiannis和Fanelli [ICALP'19]多项式拥塞游戏;改善后的边界公平成本分担游戏陈和Roughgarden [理论计算。系统:2009年];并得出新的边界非递减凹成本。我们的框架的一个有趣的特点是,它可以很容易地应用到不同的家庭的成本函数的混合物,例如,我们提供的游戏,其资源是多项式和凹成本的圆锥组合的界限。在我们的分析的核心在于使用一个统一的近似势函数,这是简单和一般的,足以适用于任意的拥塞游戏,但在同一时间足够强大,以产生国家的最先进的边界在一系列不同的成本函数。

英文摘要:

We provide a unifying, black-box tool for establishing existence of approximate equilibria in weighted congestion games and, at the same time, bounding their Price of Stability. Our framework can handle resources with general costs--including, in particular, decreasing ones--and is formulated in terms of a set of parameters which are determined via elementary analytic properties of the cost functions. We demonstrate the power of our tool by applying it to recover the recent result of Caragiannis and Fanelli [ICALP'19] for polynomial congestion games; improve upon the bounds for fair cost sharing games by Chen and Roughgarden [Theory Comput. Syst., 2009]; and derive new bounds for nondecreasing concave costs. An interesting feature of our framework is that it can be readily applied to mixtures of different families of cost functions; for example, we provide bounds for games whose resources are conical combinations of polynomial and concave costs. In the core of our analysis lies the use of a unifying approximate potential function which is simple and general enough to be applicable to arbitrary congestion games, but at the same time powerful enough to produce state-of-the-art bounds across a range of different cost functions.

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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