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Small-large subgroups of the reals

  • Andrzej Rosłanowski EMAIL logo and Saharon Shelah
Published/Copyright: May 18, 2018
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Abstract

We are interested in subgroups of the reals that are small in one and large in another sense. We prove that, in ZFC, there exists a non-meager Lebesgue null subgroup of ℝ, while it is consistent that there there is no non-null meager subgroup of ℝ.


Both authors acknowledge support from the United States-Israel Binational Science Foundation (Grant no. 2010405). Publication 1081 of the second author.URL: http://www.math.rutgers.edu/∼shelah

Communicated by David Buhagiar


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Received: 2016-6-4
Accepted: 2016-10-12
Published Online: 2018-5-18
Published in Print: 2018-6-26

© 2018 Mathematical Institute Slovak Academy of Sciences

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