Desingularization of singular Riemannian foliation

Details Desingularization of singular Riemannian foliation Desingularization of singular Riemannian foliation

2009-07-06

arxiv.org/abs/0907.0903v1

Geom. Dedicata 149, 397-416 (2010)

Mathematics

Differential Geometry

20 pages; The final publication is available at http://www.springerlink.com/content/3973u3q433765n12/

Scientific paper

10.1007/s10711-010-9489-4

Consider a singular Riemannian foliation (s.r.f for short) on a compact manifold. By successive blow-ups along the strata, we construct a regular Riemannian foliation on another compact Riemannian manifold and a desingularization map that projects leaves of the regular Riemannian foliation into leaves of the s.r.f. This result generalizes a previous result due to Molino for the particular case of a singular Riemannian foliation whose leaves were the closure of leaves of a regular Riemannian foliation. We also prove that, if the leaves of the s.r.f are compact, then, for each small epsilon, the regular foliation can be chosen so that the desingularization map induces an epsilon-isometry between the leaf space of the regular Riemannian foliation and the leaf space of the s.r.f. This implies in particular that, the leaf space of the s.r.f is is a Gromov-Hausdorff limit of a sequence of Riemannian orbifolds.

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