%0 Journal Article %A Jeffrey Lagarias %T The set of rational cycles for the 3x+1 problem %J Acta Arithmetica %D 1990 %P 33-53 %V 56 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-56-1-33-53/ %R 10.4064/aa-56-1-33-53 %G en %F 10_4064_aa_56_1_33_53