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Lukasiewicz n值命题逻辑中命题的真度理论
引用本文:李骏,黎锁平,夏亚峰.Lukasiewicz n值命题逻辑中命题的真度理论[J].数学学报,2004,47(4):769-780.
作者姓名:李骏  黎锁平  夏亚峰
作者单位:兰州理工大学理学院,兰州,730050
基金项目:甘肃省自然科学基金(ZS032-B25-031)
摘    要:利用势为 n的均匀概率空间的无穷乘积在 Lukasiewicz n值命题逻辑中引入了公式的真度概念,当3≤n≤17时证明了全体公式的真度值之集在0,1]上是稠密的,并给出了公式真度的表达通式;利用真度定义了公式间的相似度,进而导出了全体公式集上的一种伪距离,为n值Lukasiewicz命题逻辑系统的近似推理理论提供了一种可能的框架。

关 键 词:真度  相似度  近似推理
文章编号:0583-1431(2004)04-0769-12

Theory of Truth Degrees in Lukasiewicz n-Valued Propositional Logic
Jun LI,Suo Ping LI,Ya Feng XIA School of Science,Lanzhou University of Technology,Lanzhou ,P. R. China.Theory of Truth Degrees in Lukasiewicz n-Valued Propositional Logic[J].Acta Mathematica Sinica,2004,47(4):769-780.
Authors:Jun LI  Suo Ping LI  Ya Feng XIA School of Science  Lanzhou University of Technology  Lanzhou  P R China
Institution:Jun LI;Suo Ping LI;Ya Feng XIA School of Science,Lanzhou University of Technology,Lanzhou 730050, P. R. China
Abstract:By the use of the infinite product of evenly distributed probability spaces, this paper introduces the theory of truth degrees in Lukasiewicz n-valued propositional logic. It is proved that the set of truth degrees of propositions with 3≤n≤17 is dense in 0, 1], and the expressions of truth degrees are obtained. Morever, a pseudo- metric on the set of propositions is defined by means of the concept of truth degrees of propositions and a possible framework for approximate reasoning is proposed.
Keywords:Truth degree  Similarity degree  Approximate reasoning
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