Professor Emeritus Elliott Lieb was awarded the 2021 Medal of the Erwin Schrödinger Institute for Mathematics and Physics, or ESI. The citation reads, " Professor Lieb is honoured for his deep and groundbreaking mathematical analysis of fundamental problems and models of many-body physics, foremost his works of recent years, which continue to be outstanding and inspiring to a new generation of mathematical physicists. Two highlights in the realm of Coulomb systems are a mathematically rigorous justification of the Local Density Approximation in Density Functional Theory, and a proof of the equivalence in the thermodynamic limit of three different definitions of the minimum energy of a homogeneous electron gas (joint work with M. Lewin and R. Seiringer). "
Awarded in 2020 for the first time, the ESI Medal has been created to recognize outstanding achievements in any area of mathematics or physics, including contributions at the interface of the two fields. It is awarded annually and emphasis is generally given to recent achievements not older than ten years.