MathDB2 problems
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Semiproximality criterion for real-embeddable ladder systems
A ladder system … -embeddability means that there is a continuous map … that witnesses the stated real-embeddability condition. Let … H|{operatorname{Lim}times{1}}. … is a ladder s…
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Semiproximality criterion for real-embeddable almost disjoint families
Semiproximality conjecture. An $$ -embeddable almost disjoint family is semiproximal if and only if the range of some (equivalently, every) embedding contains no uncountable perfec…