%0 Journal Article %A Charles Fefferman %A Bo'az Klartag %T Fitting a $C^m$-smooth function to data, I %J Annals of mathematics %D 2009 %P 315-346 %V 169 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4007/annals.2009.169.315/ %R 10.4007/annals.2009.169.315 %G en %F 10_4007_annals_2009_169_315