Robion Kirby

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Robion Cromwell Kirby is a professor of mathematics at the University of California, Berkeley who works in low-dimensional topology. He coinvented the Kirby-Siebenmann invariant for classifying the PL-structures on a topological manifold, in which his famous torus trick is fundamental, and proved the fundamental result on the Kirby calculus, a method for describing 3-manifolds and smooth 4-manifolds by surgery on framed links.

He was elected to the National Academy of Sciences in 2001.

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