e/Kirby-Siebenmann class

Information
has gloss	eng: In mathematics, the Kirby–Siebenmann class is an element of the fourth cohomology group :e(M) \in H^4(M;\mathbfZ}_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
lexicalization	eng: Kirby-Siebenmann class
lexicalization	eng: Kirby–Siebenmann class
instance of	c/Structures on manifolds