%0 Journal Article %A L. M. Grana Drummond %A A. N. Iusem %T First Order Conditions for Ideal Minimization of Matrix-Valued Problems %J Journal of convex analysis %D 2003 %P 129-147 %V 10 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/JCA_2003_10_1_JCA_2003_10_1_a5/ %F JCA_2003_10_1_JCA_2003_10_1_a5