Powell introduced the Axiom of Double Complement () to give his double-negation interpretation of into . However, the consistency, strength, and compatibility of remain open problems. This article aims to survey the compatibility and consistency strength of , its consequence and opposites, which will be named and . We will also develop Lubarsky’s Kripke models over to derive these results. We will show that proves the Powerset axiom over and is independent of . We will also show that does not add consistency strength over , by modifying the construction of Lubarsky’s model for . We will also show that , , and are persistent under realizability under modest conditions.

生成讲解博客的中文版本

生成AI智能校验的中文版本