Contact:
HUANG Fang (1984-), female, native of Shangqiu, Henan, lecturer of Henan University, engages
in algebra
E-mail: huangfang@henu.edu.cn
About author:HUANG Fang (1984-), female, native of Shangqiu, Henan, lecturer of Henan University, engages
in algebra; CHU Yan-jun (1979-), male, native of Luohe, Henan, associate professor of Henan University, engages
in algebra.
Supported by:
Supported by National Natural Science Foundation of China (Grant No. 11226192).