%0 Journal Article %A Paolo Lipparini %T Compactness of Powers of $ \omega $ %J Bulletin of the Polish Academy of Sciences. Mathematics %D 2013 %P 239-246 %V 61 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ba61-3-5/ %R 10.4064/ba61-3-5 %G en %F 10_4064_ba61_3_5