Commuting Vectorfields on Open Manifolds
نویسندگان
چکیده
Let M be an open orientable differentiate n-manifold. More precisely, we will take M and vectorfields over M to be of class C. A nonzero vectorfield X on i f will be called nonrecurrent if the 1-dimensional foliation associated with X is regular (see [4, Chapter I]) and admits no compact leaves. The notation H(M; Z)=Q shall mean that the ^-dimensional singular integral cohomology of M is trivial or admits no torsion of order 2, depending on whether p is even or odd, respectively.
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