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Distributivity of the algebra of regular open subsets of .beta. R / R

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985840%3A_____%2F05%3A00026231" target="_blank" >RIV/67985840:_____/05:00026231 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Distributivity of the algebra of regular open subsets of .beta. R / R

  • Original language description

    We compare the structure of the algebras P(.omega.)/fin and A.omega./Fin, where A denotes the algebra of clopen subsets of the Cantor set. We show that the distributivity number of the algebra A.omega./Fin is bounded by the distributivity number of the algebra P(.omega.)/fin and by the additivity of the meager ideal on the reals. As a corollary we obtain a result of A. Dow, who showed that in the iterated Mathias model the space .beta..omega./.omega. and .beta.R/R are not co-absolute. We also show thatunder the assumption t=h the spaces .beta..omega./.omega. and .beta.R/R are co-absolute, improving on a result of E. van Douwen.

  • Czech name

    Distributivita algebry regulárních otevřených podmnožin .beta. R / R

  • Czech description

    Algebra regulárních otevřených podmnožin přírůstku Čech-Stoneovy kompaktifikace reálných čísel je píplnění algebry A.omega./fin, kde A značí algebru obojetných množin Cantorova diskontua. Je dokázáno, že distributivita této algebry je nejvýše rovna min.(h, add M), kde v add M značí additivita ideálu řídkých podmnožin reálných čísel.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    BA - General mathematics

  • OECD FORD branch

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2005

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Topology and its Applications

  • ISSN

    0166-8641

  • e-ISSN

  • Volume of the periodical

    149

  • Issue of the periodical within the volume

    1

  • Country of publishing house

    NL - THE KINGDOM OF THE NETHERLANDS

  • Number of pages

    7

  • Pages from-to

    1-7

  • UT code for WoS article

  • EID of the result in the Scopus database