Metric Structures and Fixed Point Theory

Dhananjay Gopal has a doctorate in Mathematics from Guru Ghasidas University, Bilaspur, India and is currently Associate Professor of Mathematics in Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur (C.G.), Bilaspur, Gujarat, India. He is author and co-author of several papers in journals, proceedings and a monograph on Background and Recent Developments of Metric Fixed Point Theory and a book on Introduction to metric spaces. He is devoted to general research on the theory of Nonlinear Analysis and Fuzzy Metric Fixed Point Theory. D. Gopal has active research collaborations with KMUTT, Bangkok, Thammasat University Bangkok, Jaen University Spain and in his research pursuits he has visited South Africa, Thailand, Japan and Iran.Dr. Praveen Agarwal was born in Jaipur (India) on August 18, 1979. After completing his schooling, he earned his Master’s degree from Rajasthan University in 2000. In 2006, he earned his Ph. D. (Mathematics) at the Malviya National Institute of Technology (MNIT) in Jaipur, India, which is one of the highest ranking universities in India.Dr. Agarwal has been actively involved in research as well as pedagogical activities for the last 20 years. His major research interests include Special Functions, Fractional Calculus, Numerical Analysis, Differential and Difference Equations, Inequalities, and Fixed Point Theorems. He is an excellent scholar, dedicated teacher, and prolific researcher. He has published 7 research monographs and edited volumes and more than 150 publications (with almost 100 mathematicians all over the world) in prestigious national and international mathematics journals. Dr. Agarwal worked previously either as a regular faculty or as a visiting professor and scientist in universities in several countries, including India, Germany, Turkey, South Korea, UK, Russia, Malaysia and Thailand. He has held several positions including Visiting Professor, Visiting Scientist, and Professor at various universities in different parts of the world. Specially, he was awarded most respected International Centre for Mathematical Sciences (ICMS) Group Research Fellowship to work with Prof. Dr. Michael Ruzhansky-Imperial College London at ICMS Centre, Scotland, UK, and during 2017-18, he was awarded most respected TUBITAK Visiting Scientist Fellowship to work with Prof. Dr. Onur at Ahi Evran University, Turkey. He has been awarded by Most Outstanding Researcher-2018 (Award for contribution to Mathematics) by the Union Minister of Human Resource Development of India, Mr. Prakash Javadekar in 2018. According to Google Scholar, Dr. Agarwal is cited more than 2,553 times, and on Scopus his work is cited more than 1,191 times. Dr. Agarwal is the recipient of several notable honors and awards. Dr. Agarwal provided significant service to Anand International College of Engineering, Jaipur. Under his leadership during 2010-20, Anand-ICE consistently progressed in education and preparation of students, and in the new direction of academics, research and development. His overall impact to the institute is considerable. Many scholars from different nations, including China, Uzbekistan, Thailand and African Countries came to work under his guidance. The majority of the visiting post-doctoral scholars were sent to work under Dr. Agarwal by their employing institutions for at least one month. Dr. Agarwal regularly disseminates his research at invited talks/colloquiums (over 25 Institutions all over the world).He has been invited to give plenary/keynote lectures at international conferences in the USA, Russia, India, Turkey, China, Korea, Malaysia, Thailand, Saudi Arabia, Germany, UK, Turkey, and Japan. He has served over 40 Journals in the capacity of an Editor/Honorary Editor, or Associate Editor, and published 5books as an editor. Dr. Agarwal has also organized International Conferences/ workshops’/seminars/summer schools. In summary of these few inadequate paragraphs, Dr. P. Agarwal is a visionary scientist, educator, and administrator who have contributed to the world through his long service, dedication, and tireless efforts.Poom Kumam received his Ph.D. in Mathematics from Department of Mathematics, Faculty of Science, Naresuan University. Now, he is the Professor and Associate Dean for Research and Networking, Faculty of Science, King Mongkuts University of Technology Thonburi (KMUTT) and also leading of the Theoretical and Computational Science (TaCS) Center and director of Computational and Applied Science for Smart Innovation Cluster (CLASSIC). He served on the editorial boards of various international journals and has also published more than 400 papers in Scopus and Web of Science (WoS) database. Furthermore, his research interest focuses on Fixed Point Theory and Optimization with related with optimization problems in both pure science and applied science.

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• 1 Symmetric Spaces and Fixed Point Theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Pradip Ramesh Patle and Deepesh Kumar Patel2 Fixed Point Theory in b-Metric Spaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Nguyen Van Dung and Wutiphol Sintunavarat3 Basics of w-Distances and Its Use in Various Types of Results . . . . . . . . . . . . . . . . . . . . . 67Dhananjay Gopal and Mohammad Hasan4 G-Metric Spaces: From the Perspective of F-Contractions and BestProximity Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103Vishal Joshi and Shilpi Jain5 Fixed Point Theory in Probabilistic Metric Spaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149Juan Martínez-Moreno6 Fixed Point Theory For Fuzzy ContractiveMappings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199Dhananjay Gopal and Tatjana Došenovi´c7 Set-Valued Maps and Inclusion Problems inModular Metric Spaces. . . . . . . . . . . . . 245Poom Kumam8 Graphical Metric Spaces and Fixed Point Theorems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267Satish Shukla9 Fixed Point Theory in Partial Metric Spaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283Dhananjay Gopal and Shilpi Jain