Abstract
The aim of this paper is to study foliations that remain invariant under parallel transport along the integral curves of vector fields of another foliation. According to this idea, we define a new concept of stability between foliations. A particular case of stability (called regular stability) is studied, giving a useful characterization in terms of the Riemann curvature tensor. This characterization allows us to prove that there are no regularly self-stable foliations of dimension greater than 1 in the Schwarzschild and Robertson–Walker space–times. Finally, we study the existence of regularly self-stable foliations in other space–times, like pp-wave space–times.
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