1. College of Mathematics and Physics, Wenzhou University, Wenzhou 325035, China; 2. School of
Mathematics and Statistics, Henan University, Kaifeng 475004, China
About author: HSU Ming-hsiu (1981-), male, native of Taiwan, assistant professor of Wenzhou University,
engages in functional analysis; LAI King-fai (1948-), male, native of Zhongshan, Guangdong, distinguished
professor of Henan University, engages in number theory and applied mathematics. Corresponding author: LAI
King-fai.
