1. School of Mathematical Sciences, College of Science and Technology Wenzhou‐Kean University Wenzhou 325060 Zhejiang China
2. Department of Mathematics Jaypee Institute of Information Technology Noida 201309 India
3. Department of Basic and Applied Sciences, School of Engineering and Sciences GD Goenka University Gurgaon 122103 Haryana India
4. Department of Mathematics Babeş‐Bolyai University Cluj‐Napoca 400084 Romania