1. Department of Basic Science, Huainan United University, Huainan 232001, P.R.China; 2. Department of Mathematics, Huaibei Coal Mining Teacher’s College, Huaibei 235000, P.R.China
[1] Sullivan F. Geometrical properties determined by the higher duals of a Banach space[J]. Illinois J Math,1977,21(2):315~331. [2] NAN Chao-xun. On weakly exposed points[J]. Northeastern Math J,1990,6(4):449~454. [3] Istratescu V I. Strict Convexity and Complex Strict Convexity[M]. New York and Basel:Marcel Dekker Inc,1984. [4] Panda B B, Kapoor O P. A generalization of local uniform convexity of the norm[J]. J Math Anal Appl,1975,52(3):300~308. [5] Holmes R R. Geometric Functions Analysis and Its Applications[M]. New York:Springer-Verlag,1975.
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