A weak dichotomy below E_1 \times E_3
Logic
2018-08-16 v1
Abstract
If E is an equivalence relation Borel reducible to E_1 \times E_3 then either E is Borel reducible to the equality of countable sets of reals or E_1 is Borel reducible to E. The "either" case admits further strengthening.
Keywords
Cite
@article{arxiv.0707.2706,
title = {A weak dichotomy below E_1 \times E_3},
author = {Vladimir Kanovei},
journal= {arXiv preprint arXiv:0707.2706},
year = {2018}
}