Authors
Hongliang Zuo
College of Mathematics and Information Science, Henan Normal University, China
Yuwei Li
College of Mathematics and Information Science, Henan Normal University, China
© 2022 Hongliang Zuo, Yuwei Li, published by Slovak Academy of Sciences, Mathematical Institute
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.