Abstract
Using diamond for N1, we construct a Boolean algebra in N1, whose only endomorphisms are those definable using finitely many elements and ultrafilters. We also generalize Rubin's construction to higher cardinals.
Original language | English |
---|---|
Pages (from-to) | 135-142 |
Number of pages | 8 |
Journal | Proceedings of the American Mathematical Society |
Volume | 74 |
Issue number | 1 |
DOIs | |
State | Published - Apr 1979 |
Keywords
- Boolean algebra
- Endomorphism