一句话:证明单时钟定价时间博弈的值计算是 PSPACE-难的,即使限制在树宽为三的 DAG 上,并给出树等受限类的多项式算法。
本文研究单时钟定价时间博弈(OCPTG)的值计算复杂度。作者证明该问题是 PSPACE-难的,并构造了一类具有指数多个事件点的 OCPTG,从而揭示其复杂来源。该难性甚至在最受限的博弈类(如树宽为三的 DAG)中依然成立。作为正面结果,论文给出了若干更受限 OCPTG 类的多项式时间算法,包括树结构。这些结果刻画了 OCPTG 值计算问题在一般情形与受限结构下的可解性边界。
The main result of this paper is that computing the value of a one-clock priced timed game (OCPTG) is PSPACE-hard. Along the way, we provide a family of OCPTGs that have an exponential number of event points. Both results hold even in very restricted classes of games such as DAGs with treewidth three. Finally, we provide a number of positive results, including polynomial-time algorithms for even more restricted classes of OCPTGs such as trees.