• Title of article

    COVERINGS OF GROUPS AND TYPES

  • Author/Authors

    LUDOMIR NEWELSKI and MARCIN PETRYKOWSKI، نويسنده ,

  • Issue Information
    روزنامه با شماره پیاپی سال 2005
  • Pages
    21
  • From page
    1
  • To page
    21
  • Abstract
    Assume that G is a group covered by countably many sets Xn, n<ω. It is proved that G is generated in two or three steps by a small number of the sets Xn. These results are generalized for countable coverings of types and countable colourings of graphs.
  • Journal title
    journal of the london mathematical society
  • Serial Year
    2005
  • Journal title
    journal of the london mathematical society
  • Record number

    708263