A countable definable set of reals containing no definable elements
classification
🧮 math.LO
keywords
containingcountabledefinablerealsdefineelementsfiniteforcing
read the original abstract
We make use of a finite support product of Jensen forcing to define a model in which there is a countable non-empty lightface $\Pi^1_2$ set of reals containing no ordinal-definable real.
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