Walter Neumann

{{Short description|British-American mathematician (1946–2024)}}

{{Use dmy dates|date=April 2022}}

File:Walter Neumann 1973 (portion B).jpg

Walter David Neumann (1 January 1946 – 24 September 2024) was a British-American mathematician who worked in topology, geometric group theory, and singularity theory. He was a professor at Barnard College, Columbia University. Neumann obtained his Ph.D. under the joint supervision of Friedrich Hirzebruch and Klaus Jänich at the University of Bonn in 1969.[http://math.columbia.edu/~walterfest/walterfest2011/poster/walterfest_A2.pdf Faces of Geometry, A Conference in Honor of Walter Neumann]

He was a son of the mathematicians Bernhard Neumann and Hanna Neumann. His brother Peter M. Neumann was also a mathematician.

Walter Neumann was elected a member of the European Academy of Sciences in 2002.[https://celebratio.org/Neumann_WD/article/992/ Walter D. Neumann: Curriculum Vitae], Walter D. Neumann, Celebratio Mathematica, 2022

He was in the Inaugural Class of Fellows of the American Mathematical Society, starting from 2013.[http://www.ams.org/profession/fellows-list List of Fellows of the American Mathematical Society]

Neumann died on 24 September 2024, at the age of 78.[https://sites.google.com/site/nygrouptheory/in-memoriam In Memoriam], New York Group Theory Seminar. Accessed September 25, 2024 [https://www.math.columbia.edu/2024/09/25/in-memoriam-walter-d-neumann/ In Memoriam: Walter D. Neumann], Department of Mathematics, Columbia University. Accessed October 2, 2024