Abstract
Let
In this paper, we give some necessary and sufficient conditions for
Funding source: National Natural Science Foundation of China
Award Identifier / Grant number: 12071125
Award Identifier / Grant number: 11831007
Award Identifier / Grant number: 11971500
Award Identifier / Grant number: 12061010
Funding statement: The research is supported in part by the NNSF of China (Nos. 12071125, 11831007, 11971500 and 12061010), the Science and Technology Research Project of Jiangxi Provincial Department of Education (No. GJJ2201244), the Doctoral Scientific Research Foundation of Gannan Normal University (No. BSJJ202241).
Acknowledgements
The authors would like to thank the referee for his/her many valuable comments and suggestions.
References
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