منابع مشابه
Isometry Groups and Geodesic Foliations of Lorentz Manifolds. Part Ii: Geometry of Analytic Lorentz Manifolds with Large Isometry Groups
This is part II of a series on noncompact isometry groups of Lorentz manifolds. We have introduced in part I, a compactification of these isometry groups, and called “bipolarized” those Lorentz manifolds having a “trivial ” compactification. Here we show a geometric rigidity of non-bipolarized Lorentz manifolds; that is, they are (at least locally) warped products of constant curvature Lorentz ...
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This paper is devoted to discussing affine Hirsch foliations on 3-manifolds. First, we prove that up to isotopic leaf-conjugacy, every closed orientable 3-manifold M admits 0, 1 or 2 affine Hirsch foliations. Then, we analysis the 3-manifolds admitting two affine Hirsch foliations (abbreviated as Hirsch manifolds). On one hand, we construct Hirsch manifolds by using exchangeable braided links (...
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ژورنال
عنوان ژورنال: Commentarii Mathematici Helvetici
سال: 1999
ISSN: 0010-2571,1420-8946
DOI: 10.1007/s000140050073