Definability of small puncture sets

Abstract

We characterize the class of definable families of countable sets for which there is a single countable definable set intersecting every element of the family. 

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Cite this paper

@inproceedings{Caicedo2011DefinabilityOS, title={Definability of small puncture sets}, author={Andr{\'e}s Eduardo Caicedo and John Daniel and Clemens M{\"u}nster and Clinton A Taylor and Benjamin D. Miller and Alejandro Caicedo}, year={2011} }