Person who studies various branches of mathematics (analysis, algebra and geometry, logic, etc.) and does research in this discipline to make it evolve by improving or by discovering new applications of theories, methods as well as existing mathematical tools. She applies mathematical theories and techniques to problems of quantification, measurement, forecasting or other problems that arise in fields such as civil engineering, electronics, meteorology, computing, research, administration. , etc., or she seeks to better understand certain physical phenomena. She studies the means of representing the data of a situation using symbols, formulas and mathematical algorithms in order to solve the problems under study, programs the computers for this purpose and takes care to guide the students. users. She can also offer its services as an expert or consultant.