Geodesic
Chains and antichains in Boolean algebras
Fundamenta Mathematicae, Tome 163 (2000) no. 1, pp. 55-76.

Voir la notice de l'article provenant de la source Institute of Mathematics Polish Academy of Sciences

We give an affirmative answer to problem DJ from Fremlin's list [8] which asks whether $MA_{ω_1}$ implies that every uncountable Boolean algebra has an uncountable set of pairwise incomparable elements.
DOI : 10.4064/fm-163-1-55-76

M. Losada 1 ; S. Todorčević 1

1 
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M. Losada; S. Todorčević. Chains and antichains in Boolean algebras. Fundamenta Mathematicae, Tome 163 (2000) no. 1, pp. 55-76. doi : 10.4064/fm-163-1-55-76. http://geodesic.mathdoc.fr/articles/10.4064/fm-163-1-55-76/

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