论文标题
正式不一致的逻辑丰富了替代:代数和模态帐户
Logics of Formal Inconsistency enriched with replacement: an algebraic and modal account
论文作者
论文摘要
习惯上可以从逻辑系统中期望它可以是代数,从某种意义上说,始终可以找到演绎机械的代数伴侣。自Da Costa paraconsistent Cyculi $ c_n $的成立以来,已经寻求了此类系统的代数同等标准。但是,众所周知,这些系统不是自我扩展的(即它们不满足替代属性)。除此之外,它们在Blok-pigozzi的意义上是不可代数。对于多种逻辑的层次结构系统,被称为正式不一致的逻辑(LFIS)的几个系统。因此,属于此类逻辑的几个系统仅通过非确定性的语义来表征。本文通过使用规则扩展了比$ c_1 $弱的规则,从而为LFI的代数化提供了一个解决方案,特别是与LFI的代数相关的解决方案,从而获得了替换属性(即获得LFIS的替代属性(即自我扩展)。此外,这些逻辑在标准的Lindenbaum-Tarski的意义上是可以通过其他操作扩展的各种布尔代数来代数的。此处介绍的最弱的LFI满足替代品称为RMBC,它是从称为MBC的基本LFI获得的。还研究了RMBC的一些公理扩展。此外,为此类系统定义了邻里语义。结果表明,可以在最小的双峰非正态逻辑E+E中定义RMBC,这是由非正态模态逻辑E与自身的融合所定义的。最后,将框架扩展到一阶语言。 RQMBC是RMBC的量化扩展,被证明是声音和完整的W.R.T.拟议的代数语义。
It is customary to expect from a logical system that it can be algebraizable, in the sense that an algebraic companion of the deductive machinery can always be found. Since the inception of da Costa's paraconsistent calculi $C_n$, algebraic equivalents for such systems have been sought. It is known, however, that these systems are not self-extensional (i.e., they do not satisfy the replacement property). More than this, they are not algebraizable in the sense of Blok-Pigozzi. The same negative results hold for several systems of the hierarchy of paraconsistent logics known as Logics of Formal Inconsistency (LFIs). Because of this, several systems belonging to this class of logics are only characterizable by semantics of a non-deterministic nature. This paper offers a solution for two open problems in the domain of paraconsistency, in particular connected to algebraization of LFIs, by extending with rules several LFIs weaker than $C_1$ , thus obtaining the replacement property (that is, such LFIs turn out to be self-extensional). Moreover, these logics become algebraizable in the standard Lindenbaum-Tarski's sense by a suitable variety of Boolean algebras extended with additional operations. The weakest LFI satisfying replacement presented here is called RmbC, which is obtained from the basic LFI called mbC. Some axiomatic extensions of RmbC are also studied. In addition, a neighborhood semantics is defined for such systems. It is shown that RmbC can be defined within the minimal bimodal non-normal logic E+E defined by the fusion of the non-normal modal logic E with itself. Finally, the framework is extended to first-order languages. RQmbC, the quantified extension of RmbC, is shown to be sound and complete w.r.t. the proposed algebraic semantics.