Normal and tangential structures (Ex)
From Manifold Atlas
where is the set of normal bordism classes of normal maps to with respect to the tangent bundle. (The proof is given in [Lück2001, Lemma 3.51].)
[edit] References
- [Lück2001] W. Lück, A basic introduction to surgery theory, 9 (2001), 1–224. Available from the author's homepage. MR1937016 (2004a:57041) Zbl 1045.57020