中文
Affiliations:
School of Mathematics and Information Science, Henan University of Economics and Law, Zhengzhou 450046, China
* Corresponding author (lizhiqiang@amss.ac.cn)
There is no abstract available for this article.
国家自然科学基金(61203050,61374079,11202068)
河南省高等学校青年骨干教师资助计划(2013GGJS-099)
河南省基础与前沿技术研究计划(132300410011)
河南省高等学校哲学社会科学研究“三重"重大项目 (专项)(2014-SZZD-30)
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