$S^2$-bundles over 2-orbifoldsReport as inadecuate

 $S^2$-bundles over 2-orbifolds

$S^2$-bundles over 2-orbifolds - Download this document for free, or read online. Document in PDF available to download.

Download or read this book online for free in PDF: $S^2$-bundles over 2-orbifolds
Let $M$ be a closed 4-manifold with $\pi 2(M)\cong{Z}$. Then $M$ is homotopy equivalent to either $CP^2$, or the total space of an orbifold bundle with general fibre $S^2$ over a 2-orbifold $B$, or the total space of an $RP^2$-bundle over an aspherical surface. If $\pi=\pi 1(M) ot=1$ there are at most two such bundle spaces with giv

Author: Jonathan A. Hillman

Source: https://archive.org/

Related documents