Robion Kirby
American mathematician · United States · On the map · Academics · Born 1938 · age 88
Robion Cromwell Kirby is a Professor of Mathematics at the University of California, Berkeley who specializes in low-dimensional topology. Together with Laurent C. Siebenmann he developed the Kirby-Siebenmann invariant for classifying the piecewise linear structures on a topological manifold.
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A typical day, 30 days to 21 June 2026
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He also proved the fundamental result on the Kirby calculus, a method for describing 3-manifolds and smooth 4-manifolds by surgery on framed links. Along with his significant mathematical contributions, he has over 50 doctoral students and is the editor of an influential problem list.