关于预不变拟凸函数的一些特征
On Characterizations of Prequasiinvex Functions
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摘要: 给出了预不变拟凸函数的必要条件,并利用该必要务件证明了严格预不变拟凸函数的等价条件,最后给出了中间点预不变拟凸函数的充分必要条件.Abstract: Some characterizations about prequasiinvex functions are obtained.Firstly,a necessary condition about prequasiinvex functions is established.Secondly,a necessary and sufficient condition of strictly prequasiinvex func-tions is provided by making use of the necessary condition.Finally,a necessary and sufficient condition is estab-lished about intermediate-point prequasiinvex functions.
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