Mecheri Hacene; Mecheri Salah
(Université Frères Mentouri - Constantine 1, 2013-01-01)
In this thesis the general problem is minimizing the C_{∞} norm of suitable affine mappings from B(H) to C_{∞} and B(H) → B(H).Using convex and differential analyses (Gateaux derivative) as well as input from operator ...