Professor Ugur Abdulla is one of the world's renowned mathematicians with great scholarly accomplishments. He is one of the leading experts on Partial Differential Equations and Potential Theory. He solved one of the long-standing outstanding open problems in the field posed by Kolmogorov in 1928. Throughout his career, Dr. Abdulla was a Professor at various universities of the former USSR, Germany, the United Kingdom, Italy, and the USA, Japan. Among them are the Universities of Nottingham, Paderborn, Leipzig, Max-Planck Institute of Mathematics in Natural Sciences, Massachusetts Institute of Technology. Currently he is a Professor and Head of the Analysis & PDE Unit at the Okinawa Institute of Science and Technology, Japan. Dr. Abdulla is a great teacher with an outstanding ability to convey complex mathematical concepts and ideas in a very inspirational way with superb clarity and precision. He is a master of Out Loud Mathematical Thinking.