About the Authors

Gang Wen

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Software, Validation, Visualization, Writing – original draft, Writing – review & editing

Affiliations School of Mathematics and Statistics, Zhengzhou University, Zhengzhou, Henan Province, China, Institute of Mathematics, Henan Academy of Sciences, Zhengzhou, Henan Province, China

Limin Li

Roles Funding acquisition, Project administration, Resources, Supervision, Writing – review & editing

liminli@mail.xjtu.edu.cn

Affiliation School of Mathematics and Statistics, Xi’an Jiaotong University, Xi’an, Shaanxi Province, China

Competing Interests

The authors have declared that no competing interests exist.