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arXiv cs/0610117cs.LO
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谓词为2的幂的实数的量词消去

Quantifier elimination for the reals with a predicate for the powers of two

Jeremy Avigad, Yimu Yin

摘要:

1985年,范登德里斯证明了带有2的整数幂谓词的实数理论在扩展语言中允许量词消去,因此是可判定的。他给出了一个模型论的论点,它对决策过程的复杂性没有明显的限制。我们提供了一个语法参数,产生一个过程,是原始的递归,虽然不是小学。特别是,我们表明,它是可能的,以消除一个单一的块存在量词的时间$2^0_{O(n)}$,其中$n$是输入公式的长度和$2_k^x$表示$k$倍迭代求幂。

英文摘要:

In 1985, van den Dries showed that the theory of the reals with a predicate for the integer powers of two admits quantifier elimination in an expanded language, and is hence decidable. He gave a model-theoretic argument, which provides no apparent bounds on the complexity of a decision procedure. We provide a syntactic argument that yields a procedure that is primitive recursive, although not elementary. In particular, we show that it is possible to eliminate a single block of existential quantifiers in time $2^0_{O(n)}$, where $n$ is the length of the input formula and $2_k^x$ denotes $k$-fold iterated exponentiation.

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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