Affiliation: | 1. Department of Mathematics, Institute of Computational Mathematics, Hunan University of Science and Engineering, Yongzhou, 425199, Hunan, People’s Republic of China 2. Zhangjiajie College, Jishou University, Zhangjiajie, 427000, Hunan, People’s Republic of China 3. School of Mathematics and Computational Sciences, Xiangtan University, Xiangtan, 411105, Hunan, People’s Republic of China 4. Institut für Mathematik und Informationstechnologie, Montanuniversit?t Leoben, 8700, Leoben, Austria 5. Institute of Mathematics, Zhejiang Wanli University, Ningbo, 315100, Zhejiang, People’s Republic of China
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