منابع مشابه
S2-bundles over 2-orbifolds
Let M be a closed 4-manifold with π = π1(M) 6= 1 and π2(M) ∼= Z, and let u : π → Aut(π2(M)) be the natural action. If π ∼= Ker(u) × Z/2Z then M is homotopy equivalent to the total space of an RP -bundle over an aspherical surface. We show here that if π is not such a product then M is homotopy equivalent to the total space of an S-orbifold bundle over a 2orbifold B. There are at most two such o...
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is a vector space isomorphism of V" onto T(m). The tangent bundle 3(Af) of the manifold M consists of the ordered pairs (m, v) where mEM and vE T(m). Therefore, as a point set only, 3(Af) is M X V". We shall assume that the reader is familiar with the fibre space topology which is customarily assigned to 3(M). (For a description of this topology and the facts concerning fibre bundles which we s...
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ژورنال
عنوان ژورنال: Journal of the Korean Mathematical Society
سال: 2005
ISSN: 0304-9914
DOI: 10.4134/jkms.2005.42.4.621