This is an open access book. We warmly invite you to participate in Mathematics and Science Education International Seminar that was held on November 13th, 2021 in Bengkulu – Indonesia. Since participants may come from different countries with variety of backgrounds, the conference is an excellent forum for participants to exchange research findings and ideas on mathematics and science and to build networks for further collaborations.. The disruption era is related to the development of the industrial revolution 4.0 and society 5.0 era. Industrial revolution 4.0 era is marked by massive digital technology development in all aspects. Digital technology transformation is applied in human life and it is known as human-centered society. Development of digital technology has been influence some aspects such as education, environment, and society. Using digital technology does not only gives negative impacts but also positive impacts. It is important to strengthen sustainable education that has insight into conservation and local wisdom in this era for a better society.

This is the most readable and thorough graduate textbook and reference for combinatorics, covering enumeration, graphs, sets, and methods.

This book gathers original research papers presented at the 4th International Conference on Computational Mathematics and Engineering Sciences, held at Akdeniz University, Antalya, Turkey, on 20–22 April 2019. Focusing on computational methods in science, mathematical tools applied to engineering, mathematical modeling and new aspects of analysis, the book discusses the applications of mathematical modelling in areas such as health science, engineering, computer science, social science, and economics. It also describes a wide variety of analytical, computational, and numerical methods. The conference aimed to foster cooperation between students and researchers in the areas of computational mathematics and engineering sciences, and provide a platform for them to share significant research ideas. This book is a valuable resource for graduate students, researchers and educators interested in the mathematical tools and techniques required for solving various problems arising in science and engineering, and understanding new methods and uses of mathematical analysis.