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arXiv 2202.04340cs.FL
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从正则变换表达式有效构造可逆变换

Efficient Construction of Reversible Transducers from Regular Transducer Expressions

Luc Dartois, Paul Gastin, R. Govind, Shankaranarayanan Krishna

摘要:

正则变换类有几个等价的特征,如函数MSO变换,确定性双向变换,流式字符串变换,以及正则变换表达式(RTE)。对于算法应用,将规格(这里是RTE)转换为机器(这里是传感器)是非常常见和有用的。在本文中,我们给出了一个有效的结构的双向可逆换能器(2RFT)等价于一个给定的RTE。2RFT是一类性能良好的换能器,具有确定性和共确定性(因此允许在线性时间\wrt中评估输入字),并且其中组合仅具有多项式复杂度。我们发现,对于完整的RTE,所构造的2RFT的大小双指数的大小的表达,而如果RTE不使用Hadamard产品或链星,所构造的2RFT的大小指数的大小的RTE。

英文摘要:

The class of regular transformations has several equivalent characterizations such as functional MSO transductions, deterministic two-way transducers, streaming string transducers, as well as regular transducer expressions (RTE). For algorithmic applications, it is very common and useful to transform a specification, here, an RTE, to a machine, here, a transducer. In this paper, we give an efficient construction of a two-way reversible transducer (2RFT) equivalent to a given RTE. 2RFTs are a well behaved class of transducers which are deterministic and co-deterministic (hence allows evaluation in linear time \wrt the input word), and where composition has only polynomial complexity. We show that, for full RTE, the constructed 2RFT has size doubly exponential in the size of the expression, while, if the RTE does not use Hadamard product or chained-star, the constructed 2RFT has size exponential in the size of the RTE.

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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