39 research outputs found

    Selections on Ψ\Psi-spaces

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    summary:We show that if \Cal A is an uncountable AD (almost disjoint) family of subsets of ω\omega then the space \Psi(\Cal A) does not admit a continuous selection; moreover, if \Cal A is maximal then \Psi(\Cal A) does not even admit a continuous selection on pairs, answering thus questions of T. Nogura

    Topological properties of incomparable families

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    Binding Energy of Al(C 6

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