%0 Journal Article %A Stephen Keith %A Xiao Zhong %T The Poincaré inequality is an open ended condition %J Annals of mathematics %D 2008 %P 575-599 %V 167 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4007/annals.2008.167.575/ %R 10.4007/annals.2008.167.575 %G en %F 10_4007_annals_2008_167_575