199. 10.4 Bundle spaces are geometric. 203. 10.5 Fundamental groups of S2 E2 -manifolds. ... The errors and typos discovered to date (20 December 2023) have been cor-rected.
1 e2 for the pseudo-projectiveplane with fundamental group Z/Z. If B is a 2-orbifold then |B| is the underlyingsurface. ... Theorem 2.20]. Embeddings j0, j1 : M S4 are s-concordant if they extendto an embedding of M [0, 1] in S4 [0, 1] whose
cross-caps. In Chapter 6 we shall also use the notation RP = S1 e2 for the. ... S4. If M is a closed orientable 3-manifold then it is Z-homology cobordant to a3-manifold which is Haken and hyperbolic [Liv81, My83].