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arXiv 1812.01062cs.GT
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加权时间对策的符号逼近

Symbolic Approximation of Weighted Timed Games

Damien Busatto-Gaston, Benjamin Monmege, Pierre-Alain Reynier

摘要:

加权定时游戏是两个玩家在配备有权重的定时自动机上进行的零和游戏,其中一个玩家希望在达到目标的同时最小化累积的权重。加权定时游戏是出了名的困难和快速不可判定,即使限制到非负权重。对于非负权重,Bouyer、Jaziri和Markey在2015年引入了可以分析的最大类。虽然价值问题是不可判定的,作者展示了如何近似的值,考虑区域的细化粒度。在这项工作中,我们扩展了这个类,将负权重,允许一个模型的能量,例如,并证明该值仍然可以近似,具有相同的复杂性。此外,我们表明,一个符号算法,依赖于值迭代的范例,可以用作这个类的近似模式。

英文摘要:

Weighted timed games are zero-sum games played by two players on a timed automaton equipped with weights, where one player wants to minimise the accumulated weight while reaching a target. Weighted timed games are notoriously difficult and quickly undecidable, even when restricted to non-negative weights. For non-negative weights, the largest class that can be analysed has been introduced by Bouyer, Jaziri and Markey in 2015. Though the value problem is undecidable, the authors show how to approximate the value by considering regions with a refined granularity. In this work, we extend this class to incorporate negative weights, allowing one to model energy for instance, and prove that the value can still be approximated, with the same complexity. In addition, we show that a symbolic algorithm, relying on the paradigm of value iteration, can be used as an approximation schema on this class.

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