Affiliation: | 1. Division of Mathematics and Mathematical Science, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Nagoya, 466-8555, Japan 2. College of Mathematics, Inner Mongolia University for the Nationalities, 536 Huo Lin He Street, Tongliao, Inner Mongolia Autonomous, 028043, People’s Republic of China 3. Department of Mathematics, Nagoya Institute of Technology, Gokiso, Nagoya, 466-8555, Japan
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