About the Authors

Xiqiao Xia

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

xiaxiqiao879@126.com, xx2364@columbia.edu

Affiliations College of Mathematics, Sichuan University, Chengdu, Sichuan, China, Teachers College, Columbia University, New York, New York, United States of America

Competing Interests

The authors have declared that no competing interests exist.