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arXiv 1701.04786cs.LO
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关于高阶概率次递归

On Higher-Order Probabilistic Subrecursion

Flavien Breuvart, Ugo Dal Lago, Agathe Herrou

AI总结:

本文研究次递归概率高阶演算的表达能力,证明赋予哥德尔$\mathbb{T}$不同概率选择算子会导致分布类别不等价,但均保证几乎必然终止,并引入概率可归约性技术,表明简单概率选择不改变$\mathbb{T}$的表达力。

摘要:

我们研究了次递归概率高阶演算的表达能力。更具体地说,我们证明了,像哥德尔的$\mathbb{T}$这样表达力极强的确定性演算,在赋予各种形式的概率选择算子后,可能产生在它们所引发的分布类别上不等价的演算,尽管它们都保证几乎必然终止。在此过程中,我们引入了经典可归约性技术的一个概率变体,并证明了最简单的概率选择形式使$\mathbb{T}$的表达能力基本保持不变。本文最后给出了一些关于函数表达能力的观察:如预期的那样,所有考虑的演算都捕获了$\mathbb{T}$本身所表示的函数,至少在考虑标准观察概念时是这样。

英文摘要:

We study the expressive power of subrecursive probabilistic higher-order calculi. More specifically, we show that endowing a very expressive deterministic calculus like Gödel's $\mathbb{T}$ with various forms of probabilistic choice operators may result in calculi which are not equivalent as for the class of distributions they give rise to, although they all guarantee almost-sure termination. Along the way, we introduce a probabilistic variation of the classic reducibility technique, and we prove that the simplest form of probabilistic choice leaves the expressive power of $\mathbb{T}$ essentially unaltered. The paper ends with some observations about the functional expressive power: expectedly, all the considered calculi capture the functions which $\mathbb{T}$ itself represents, at least when standard notions of observations are considered.

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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