Welcome to the 4th International Conference on Recent Advances in Mathematical Sciences and its Applications (RAMSA-2020) being organized by the Department of Mathematics, JIIT Noida during January 09-11, 2020.The aim of the conference is to bring together learned mathematicians, scientists, engineers, researchers, from industry and research scholars working in the different areas of mathematics. This will provide a platform for exchange of ideas regarding the research findings and new advances in the wide areas of mathematics, sciences and engineering and to discuss the practical challenges encountered in the different domains of applications and the solutions adopted thereto. Further, it will provide an opportunity to enhance collaboration among researchers not only from the various parts of the country but also from abroad. The scientific program will consist of plenary and parallel invited lectures and parallel contributed presentation sessions. The main emphasis will be on the vibrant implicational aspects of applied mathematics in relation to diverse areas of engineering and sciences. The invited lectures and referred contributed papers will be published in Scopus Indexed Proceedings after due reviewing process by the committee of experts in various disciplines.