Tree Polymatrix Games are PPAD-hard

Tree Polymatrix Games are PPAD-hard
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树多矩阵游戏是 PPAD 难的

DOI:
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发表时间:
2020
期刊:
International Colloquium on Automata, Languages and Programming
影响因子:
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通讯作者:
Rahul Savani
Rahul Savani
中科院分区:
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文献类型:
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作者:
Argyrios Deligkas;John Fearnley;Rahul Savani

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我们证明了,这是PPAD-困难的计算纳什均衡在树多矩阵游戏与20个行动,每个球员。这是第一个PPAD硬度结果,每个玩家的动作数量恒定,其中交互图是非循环的。沿着的方式,我们显示了PPAD-硬度找到一个2D LinearFIXP实例的$\sqrt $-不动点,当$\sqrt $是任何小于$(\sqrt{2} - 1)/2 \approximat0.2071 $的常数。这升降机的硬度制度从多项式小近似在$k$维常数近似在二维,我们的常数是相当大的相比,平凡的上限为0.5 $。
We prove that it is PPAD-hard to compute a Nash equilibrium in a tree polymatrix game with twenty actions per player. This is the first PPAD hardness result for a game with a constant number of actions per player where the interaction graph is acyclic. Along the way we show PPAD-hardness for finding an $\epsilon$-fixed point of a 2D LinearFIXP instance, when $\epsilon$ is any constant less than $(\sqrt{2} - 1)/2 \approx 0.2071$. This lifts the hardness regime from polynomially small approximations in $k$-dimensions to constant approximations in two-dimensions, and our constant is substantial when compared to the trivial upper bound of $0.5$.
多矩阵博弈计算均衡的实证研究
DOI: --
发表时间: 2016
期刊: --
影响因子: --
作者:
A. Deligkas
通讯作者: A. Deligkas