Comprehending Isabelle/HOL's Consistency

Comprehending Isabelle/HOL's Consistency
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理解 Isabelle/HOL 的一致性

DOI:
10.1007/978-3-662-54434-1_27
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Andrei Popescu
Andrei Popescu
中科院分区:
--
文献类型:
--
作者:
Ondřej Kunčar;Andrei Popescu

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证明助手Isabelle/HOL是基于高阶逻辑(HOL)的扩展,具有常量的特设重载。事实证明,标准HOL类型定义和Isabelle特定的特殊重载之间的交互对于逻辑一致性来说是有问题的。在以前的工作中,我们认为,标准的HOL语义不再适合捕捉这种相互作用,并证明了使用非标准语义的一致性。使用外来语义使得社区难以理解该证明。在本文中,我们证明了一致性的证明理论的手段,以下健康的直觉定义的缩写,实现在HOLC,逻辑,增强HOL的理解类型。我们希望我们的新证明一劳永逸地解决了Isabelle/HOL一致性问题。此外,HOLC提供了一个框架,证明新的演绎模式,解决实际用户的需求的一致性。
The proof assistant Isabelle/HOL is based on an extension of Higher-Order Logic (HOL) with ad hoc overloading of constants. It turns out that the interaction between the standard HOL type definitions and the Isabelle-specific ad hoc overloading is problematic for the logical consistency. In previous work, we have argued that standard HOL semantics is no longer appropriate for capturing this interaction, and have proved consistency using a nonstandard semantics. The use of an exotic semantics makes that proof hard to digest by the community. In this paper, we prove consistency by proof-theoretic means—following the healthy intuition of definitions as abbreviations, realized in HOLC, a logic that augments HOL with comprehension types. We hope that our new proof settles the Isabelle/HOL consistency problem once and for all. In addition, HOLC offers a framework for justifying the consistency of new deduction schemas that address practical user needs.
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