About the Authors
- Lei Ren
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Roles Funding acquisition, Methodology, Writing – original draft, Writing – review & editing
* E-mail: renqihan@hotmail.com
Affiliation School of Mathematics and Statistics, Shangqiu Normal University, Shangqiu, Henan, People’s Republic of China
- Shixin Jin
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Roles Data curation, Funding acquisition
Affiliation School of Mathematics and Statistics, Shangqiu Normal University, Shangqiu, Henan, People’s Republic of China
Competing Interests
The authors have declared that no competing interests exist.