%0 Journal Article %A J. William Helton %A Scott McCullough %T Every convex free basic semi-algebraic set has an LMI representation %J Annals of mathematics %D 2012 %P 979-1013 %V 176 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4007/annals.2012.176.2.6/ %R 10.4007/annals.2012.176.2.6 %G en %F 10_4007_annals_2012_176_2_6