Kervaire semi-characteristic

From Wikipedia, the free encyclopedia
Jump to: navigation, search

In mathematics, the Kervaire semi-characteristic, introduced by Kervaire (1956), is an invariant of manifolds M of dimension 4n+1 taking values in Z/2Z, given by

k(M) =

Atiyah & Singer (1971) showed that it is given by the index of a skew-adjoint elliptic operator.

References[edit]