摘要
给出二元Copula为弱Schur凹的充分必要条件.引入弱Schur几何凹的概念,讨论了一类Copula的弱Schur凹及其弱Schur几何凹.综合考虑了左边块对称与右边块对称,回答了王沁提出的几个问题,提出几个进一步讨论的问题.
In this paper a sufficient and necessary condition for copulas involving weak Schur-concavity is given.The weak geometric Schur concavity is introduced and studied.Some examples are provided.We consider the left block symmetry combined with the right block symmetry and answer some questions proposed by Wang Qin.Finally,some questions for further research are presented.
出处
《系统科学与数学》
CSCD
北大核心
2010年第12期1719-1726,共8页
Journal of Systems Science and Mathematical Sciences
基金
全国统计科学研究计划项目(2008LY048)
安徽省教育厅基地项目(2008sk215)资助
