TY - JOUR AU - Zolezzi, T. TI - Condition numbers and Ritz type methods in unconstrained optimization JO - Control and Cybernetics PY - 2007 SP - 811 EP - 822 VL - 36 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CC_2007_36_3_a21/ LA - en ID - CC_2007_36_3_a21 ER -