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arXiv 2108.13495math.LO
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卡塔赫纳逻辑

Cartagena Logic

Siiri Kivimäki, Jouko Väänänen, Andrés Villaveces

AI总结:

本文引入一种基于布尔扩张的新型无穷逻辑——卡塔赫纳逻辑,证明其模型论性质,并表明它是Shelah无穷逻辑的一个具有清晰生成语法的良好近似。

摘要:

我们引入一种新型的无穷逻辑,称之为${\mathcal L}_{κκ}$的布尔扩张。这种逻辑涉及一种新型变量,我们称之为广义布尔变量。这些变量的取值范围类似于随机变量,覆盖一个基数的幂集。从这种布尔扩张中,我们提取出一种传统的无穷逻辑,称为卡塔赫纳逻辑。我们证明了卡塔赫纳逻辑的若干模型论性质,并给出了其表达力的多个例子。主要结果是,卡塔赫纳逻辑是Shelah的无穷逻辑${\mathcal L}^1_κ$的一个良好的语法定义近似。后者尚未已知具有生成语法,而卡塔赫纳逻辑则具有非常清晰的生成语法。

英文摘要:

We introduce a new kind of infinitary logic that we call Boolean expansion of ${\mathcal L}_{κκ}$. This logic involves a new kind of variable, that we call generalised Boolean variable. These variables range over the powerset of a cardinal number in a way reminiscent of random variables. From this Boolean expansion, we extract a traditional infinitary logic, called Cartagena logic. We prove several model-theoretic properties of Cartagena logic, and give multiple examples of its expressive power. The main result is that Cartagena logic is a good syntactically defined approximation to Shelah's infinitary ${\mathcal L}^1_κ$. The latter is not known to have a generative syntax, while Cartagena logic does have a very clear one.

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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