%0 Journal Article %A Melvyn B. Nathanson %A Kevin O'Bryant %T A problem of Rankin on sets without geometric progressions %J Acta Arithmetica %D 2015 %P 327-342 %V 170 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa170-4-2/ %R 10.4064/aa170-4-2 %G en %F 10_4064_aa170_4_2