S. KESAVAN is former professor at the Institute of Mathematical Sciences, Chennai, and adjunct faculty at the Indian Institute of Technology Madras, Chennai, India. He started his career at the Tata Institute of Fundamental Research Centre for Applicable Mathematics (TIFR-CAM), Bangalore, India, in 1973. He has also been associated with the Chennai Mathematical Institute, where he was deputy director during 2007-2010 and he is currently adjunct professor at the Indian Institute of Technology, Madras. He earned his PhD from Université Pierre-et-Marie-Curie, Paris, in 1979. He is a fellow of the National Academy of Sciences, India, at Allahabad and the Indian Academy of Sciences, Bangalore, India. He is a life member of the National Board for Higher Mathematics, since 2000, Indian Mathematical Society, International Society for the Interaction of Mechanics and Mathematics (ISIMM), Indian Society of Industrial and Applicable Mathematics (ISIAM), Ramanujan Mathematical Society, American Mathematical Society and an elected fellow of the Forum d'Analystes, Chennai. He was also the Secretary (Grant Selection) of the Commission for Developing Countries of the International Mathematical Union, during 2011-2014 and 2015-2018. He has published four books and authored over 50 research articles, apart from several contributions to conference proceedings and popular articles. His research interests are in partial differential equations, homogenization, control theory, and isoperimetric inequalities.