A Sacks Real out of Nowhere
Abstract
There is a proper countable support iteration of length ω adding no new reals at finite stages and adding a Sacks real in the limit.
0
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.