Firstly,the proof of the density of set is given .By the lemma and the conditions which maps are continuous, a necessary and sufficient condition of a kind of the convexity of the sets is given .Thus the verification of the kind of convexity becomes the
参考文献
相似文献
引证文献
引用本文
赵克全.关于一类E-凸集的判别准则[J].重庆工商大学学报(自然科学版),2004,(5): ZHAO Ke-quan. On criteria of a kind of convex sets[J]. Journal of Chongqing Technology and Business University(Natural Science Edition),2004,(5):