Kirby-Siebenmann class

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

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

[edit] See also

• Hauptvermutung

[edit] References

• Yuli B. Rudyak (2001). "Piecewise linear structures on topological manifolds." .
• Foundational Essays on Topological Manifolds, Smoothings, and Triangulations. by Robion C. Kirby, Laurence C. Siebenmann ISBN 0-691-08191-3
• Topology of 4-Manifolds by Robion C. Kirby ISBN 0-387-51148-2