Geodesic
Structure Theory for Montgomery-Samelson Fiberings between Manifolds. I
Canadian journal of mathematics, Tome 21 (1969) no. 1, pp. 170-179

Voir la notice de l'article provenant de la source Cambridge University Press

In (12), Montgomery and Samelson conjectured that an MS-fibering of polyhedra with total space an n-sphere must have a homology sphere as its singular set. Mahowald (11) has shown that, indeed, an orientable fibering with n ≧ 4 must have a Z 2-cohomology sphere as its singular set, while Conner and Dyer (4) have shown this for n arbitrary provided the fiber itself is a Z 2-cohomology sphere. We show that if the singular set is tame, then it is a Z-homology sphere if the fiber is also one. This result together with those of Stallings (15), Gluck (7), and Newman and Connell (13) are applied in the case where the singular sets are locally flat and tame. It is shown (Theorem 5.2) that MS-fiberings of spheres on spheres, with closed connected manifold fibers and singular sets, are topologically just suspensions of (Hopf) sphere bundles. In a subsequent publication, the case where the singular sets are finite shall be considered. The reader is invited to consult (3) and (18) in this case. 
Antonelli, Peter L. Structure Theory for Montgomery-Samelson Fiberings between Manifolds. I. Canadian journal of mathematics, Tome 21 (1969) no. 1, pp. 170-179. doi: 10.4153/CJM-1969-016-4
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