Chen, Tianran https://orcid.org/0000-0001-9923-4883
Funding for this research was provided by:
Directorate for Mathematical and Physical Sciences (115587)
American Mathematical Society (Simons Travel Grant)
Auburn University at Montgomery (Grant-In-Aid program)
Article History
Received: 8 March 2017
Revised: 19 February 2019
Accepted: 5 March 2019
First Online: 20 March 2019