Universal bundle

In mathematics, the Kirby–Siebenmann class is an element of the fourth cohomology group

$e(M)\in H^4(M;{\mathbf{Z}}_2)$

which must vanish if a topological manifold M is to have a piecewise linear structure. It is named for Robion Kirby and Larry Siebenmann.

See also

• Hauptvermutung

References

• Template:Cite arXiv
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• Topology of 4-Manifolds by Robion C. Kirby ISBN 0-387-51148-2

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