Semi-Cohen Versus Cohen Algebras
Abstract
We show that there are semi-Cohen Boolean algebras which cannot be completely embedded into Cohen Boolean algebras. Using the ideas from this proof, we give a simpler argument for a theorem of S. Koppelberg and S. Shelah, stating that there are complete subalgebras of Cohen algebras which are not Cohen themselves.
- Publication:
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arXiv Mathematics e-prints
- Pub Date:
- November 1994
- DOI:
- 10.48550/arXiv.math/9411208
- arXiv:
- arXiv:math/9411208
- Bibcode:
- 1994math.....11208Z
- Keywords:
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- Mathematics - Logic