Oxford Mathematician Martin Bridson together with co-author André Haefliger has won the 2020 Steele Prize for Mathematical Exposition awarded by the American Mathematical Society for the book 'Metric Spaces of Non-positive Curvature', published by Springer-Verlag in 1999.
In the words of the citation "Metric Spaces of Non-positive Curvature is the authoritative reference for a huge swath of modern geometric group theory. It realizes Mikhail Gromov's vision of group theory studied via geometry, has been the fundamental textbook for many graduate students learning the subject, and has paved the way for the developments of the subsequent decades."
Professor Martin Bridson is Whitehead Professor of Pure Mathematics in Oxford, A Fellow of Magdalen College and President of the Clay Mathematics Institute. His research interests lie in geometric group theory, low-dimensional topology, and spaces of non-positive curvature. Born on the Isle of Man, In 2016 Martin became only the second Manxman to ever be elected to the Royal Society, after Edward Forbes.