%0 Journal Article %A Cholak, Peter %A Downey, Rodney %A Harrington, Leo %T On the orbits of computably enumerable sets %J Journal of the American Mathematical Society %D 2008 %P 1105-1135 %V 21 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-08-00604-8/ %R 10.1090/S0894-0347-08-00604-8 %F 10_1090_S0894_0347_08_00604_8