The Oppenheim Lectures is a distinguished lecture series jointly organized by the Department of Mathematics, and the Institute for Mathematical Sciences at the National University of Singapore (NUS). It is held annually beginning from the Academic Year 2014/2015, and is in honour of Sir Alexander Oppenheim, who held the position of Professor and first Head of the Department from 1931 until 1959. Professor Oppenheim was also Vice Chancellor of the University of Malaya (the predecessor of NUS) from 1957 to 1963. He was a well-known number theorist, notably for the Oppenheim Conjecture, which was settled by Gregori Margulis in the affirmative in 1986.