The formal verification of the ctm approach to forcing

被引:0
作者
Gunther, Emmanuel [1 ]
Pagano, Miguel [1 ]
Terraf, Pedro Sanchez [1 ,2 ]
Steinberg, Matias [1 ]
机构
[1] Univ Nacl Cordoba, Fac Matemat Astron Fis & Comp, Cordoba, Argentina
[2] Consejo Nacl Invest Cient & Tecn, Ctr Invest & Estudios Matemat CIEM, FAMAF, Cordoba, Argentina
关键词
Isabelle/ZF; Countable transitive models; Continuum hypothesis; Proof assistants; Interactive theorem provers; Generic extension; SET-THEORY; CALCULUS;
D O I
10.1016/j.apal.2024.103413
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
We discuss some highlights of our computer-verified proof of the construction, given a countable transitive set-model M of ZFC, of generic extensions satisfying ZFC + not sign CH and ZFC + CH. Moreover, let R be the set of instances of the Axiom of Replacement. We isolated a 21-element subset 12 C R and defined F : R - R such that for every phi C R and M-generic G, M |= ZC U F"phi U 12 implies M[G] |= ZC U phi U { not sign CH}, where ZC is Zermelo set theory with Choice. To achieve this, we worked in the proof assistant Isabelle, basing our development on the Isabelle/ZF library by L. Paulson and others. (c) 2024 Elsevier B.V. All rights reserved.
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页数:28
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