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北美退伍军人节(Veterans Day),12 日无更新
arXiv 1606.08014cs.CC
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参数化${\rm AC}^0$的一些下界

Some lower bounds in parameterized ${\rm AC}^0$

Yijia Chen, Joerg Flum

摘要:

我们通过与经典${\rm AC}^0$相对应的参数化类证明了参数化问题的一些下界。除其他外,我们得出这样一个下界的所有FPT近似的参数化集团的问题和参数化停机问题,这最近变成了链接问题的计算复杂性,描述的复杂性,和证明理论。为了证明第一个下界,我们证明了一个强${\rm AC}^0$版本的种植集团猜想:${\rm AC}^0$ -电路渐近几乎肯定不能区分一个随机图和这个图与随机种植集团的任何大小$\le n^ξ$(其中$0 \le ξ< 1$)。

英文摘要:

We demonstrate some lower bounds for parameterized problems via parameterized classes corresponding to the classical ${\rm AC}^0$. Among others, we derive such a lower bound for all fpt-approximations of the parameterized clique problem and for a parameterized halting problem, which recently turned out to link problems of computational complexity, descriptive complexity, and proof theory. To show the first lower bound, we prove a strong ${\rm AC}^0$ version of the planted clique conjecture: ${\rm AC}^0$-circuits asymptotically almost surely can not distinguish between a random graph and this graph with a randomly planted clique of any size $\le n^ξ$ (where $0 \le ξ< 1$).

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