TY - JOUR AU - Charles Fefferman AU - Bo'az Klartag TI - Fitting a $C^m$-smooth function to data, I JO - Annals of mathematics PY - 2009 SP - 315 EP - 346 VL - 169 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4007/annals.2009.169.315/ DO - 10.4007/annals.2009.169.315 LA - en ID - 10_4007_annals_2009_169_315 ER -