Contact:
FAN Li-ping (1982-), Female, native of Jiyuan, Henan, associate professor of Henan University,
engages in martingale theory.
E-mail:lipingfan@henu.edu.cn
About author: FAN Li-ping (1982-), Female, native of Jiyuan, Henan, associate professor of Henan University,
engages in martingale theory.