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math.LO2023
On the ABK Conjecture, alpha-well Quasi Orders and Dress-Schiffels product
Uri Abraham, Robert Bonnet, Mirna Džamonja +1
The following is a 2008 conjecture of Abraham, Bonnet and Kubiś: [ABK Conjecture] Every well quasi order (wqo) is a countable union of better quasi orders (bqo). We obtain a partia…
math.LO2021★ 3 cited
Ultrafilter selection and Corson compacta
Robert Bonnet, Wieslaw Kubiś, Stevo Todorčević
We study the question which Boolean algebras have the property that for every generating set there is an ultrafilter selecting maximal number of its elements. We call it the ultraf…