On the average of inner and outer measures
Colacunary sequences in L-spaces
Measure-additive coverings and measurable selectors
Each reference is followed by a list of the paragraphs referring to it.
A note on the intersections of countably generated σ-algebras
Compact sets without converging sequences in the random real model.
Sequential closedness of Boolean algebras of projections in Banach spaces
Complete and σ-complete Boolean algebras of projections acting in a Banach space were introduced by W. Bade in the 1950's. A basic fact is that every complete Boolean algebra of projections is necessarily a closed set for the strong operator topology. Here we address the analogous question for σ-complete Boolean algebras: are they always a sequentially closed set for the strong operator topology? For the atomic case the answer is shown to be affirmative. For the general case, we develop criteria...
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