00257nam a2200109Ia 4500003000400000008004100004082002100045100002200066245002000088260003100108300000800139OSt170901s1973    xx            000 0 und d  a320.540954bN21G  aRockfellar, R. T. 0aConvex Analysis  bPrinuton Univ. Pressc1970  a451