Paul Arne Østvær
    Department of Mathematics
    University of Oslo
    P.O.Box 1053, Blindern
    0316 Oslo
    Norway

    Office: B709, N. H. Abels hus
    Telephone: (+47) 22 85 59 12
    Telefax: (+47) 22 85 43 49
    E-mail: paularne at math.uio.no