Abstract
We build a weakly normal ultrafilter which is amenable to its ultrapower. This answers a question of G. Goldberg [The internal relation, arXiv:1810.04290v2, 2018].
Original language | English |
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Pages (from-to) | 1331-1337 |
Number of pages | 7 |
Journal | Proceedings of the American Mathematical Society |
Volume | 150 |
Issue number | 3 |
DOIs | |
State | Published - 2022 |