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In this work we show that there is a Riemannian groupoid whose orbits are the closures of the leaves of a regular Riemannian foliation on a compact manifold. This groupoid is equivalent (in a generalized sense of Haefliger) with a…

Differential Geometry · Mathematics 2013-05-29 Paul Popescu

In this note we give a characterization of taut Riemannian foliations using the transverse divergence. This result turns out to be a convenient tool in the case of some standard examples. Furthermore, we show that a classical tautness…

Differential Geometry · Mathematics 2016-02-10 Vladimir Slesar

We classify all simply connected Riemannian manifolds whose isotropy groups act with cohomogeneity less than or equal to two.

Differential Geometry · Mathematics 2011-05-16 Andreas Kollross , Evangelia Samiou

We prove that there are only finitely many isoparametrically foliated closed connected Riemannian manifolds with bounded geometry, fixed dimension $n\neq5$, and finite fundamental group, up to foliated diffeomorphism. In addition, we…

Differential Geometry · Mathematics 2026-03-24 Manuel Krannich , Alexander Lytchak , Marco Radeschi

We obtain a local classification of complex homothetic foliations on Kaehler manifolds by complex curves. This is used to construct almost Kaehler, Ricci-flat metrics subject to additional curvature properties.

Differential Geometry · Mathematics 2012-06-18 Simon G. Chiossi , Paul-Andi Nagy

We study Riemannian foliations with complex leaves on Kaehler manifolds. The tensor T, the obstruction to the foliation be totally geodesic, is interpreted as a holomorphic section of a certain vector bundle. This enables us to give…

Differential Geometry · Mathematics 2012-07-02 Paul-Andi Nagy

It is well known that, by the Reeb stability theorem, the leaf space of a Riemannian foliation with compact leaves is an orbifold. We prove that, under mild completeness conditions, the leaf space of a Killing Riemannian foliation is a…

Differential Geometry · Mathematics 2024-08-30 Yi Lin , David Miyamoto

We give a complete classification of foliations on open contact manifolds whose leaves are contact submanifolds of the ambient manifold. The results are analogues of Haefliger's classification of foliations on open manifold.

Differential Geometry · Mathematics 2014-11-04 Mahuya Datta , Sauvik Mukherjee

We prove that any smooth foliation that admits a Riemannian foliation structure has a well-defined basic signature, and this geometrically defined invariant is actually a foliated homotopy invariant. We also show that foliated homotopic…

Differential Geometry · Mathematics 2024-06-17 Georges Habib , Ken Richardson

We study the transversally harmonic maps between foliated Riemannian manifolds. In particular, we prove that under some curvature conditions, any transversally harmonic map is transversally totally geodesic.

Differential Geometry · Mathematics 2011-09-20 Min Joo Jung , Seoung Dal Jung

In this paper we study singular riemannian foliations that have sections,i.e., totally geodesic complete immersed submanifolds that meet each leaf orthogonally and whose dimensions are the codimensions of the regular leaves. We prove here…

Differential Geometry · Mathematics 2007-05-23 Marcos M. Alexandrino

In this work, we find an equation that relates the Ricci curvature of a riemannian manifold $M$ and the second fundamental forms of two orthogonal foliations of complementary dimensions, $\mathcal{F}$ and $\mathcal{F}^{\bot}$, defined on…

Differential Geometry · Mathematics 2017-11-16 André de Oliveira Gomes , Eurípedes Carvalho da Silva

This article details a construction of symplectic foliations on 3-dimensional orientable riemannian manifolds from harmonic forms; and how it suggests a topological approach to Poisson's equation and newtonian gravity.

Symplectic Geometry · Mathematics 2022-03-24 Romero Solha

We prove that (apart from dimension $n=4$), each Riemannian solenoidal lamination with transitive homeomorphism group and leaves isometric to a symmetric space $X$ of noncompact type, is homeomorphic to the inverse limit of the system of…

Geometric Topology · Mathematics 2023-09-06 Michael Kapovich

We characterize functions which are growth types of Riemannian manifolds of bounded geometry.

Differential Geometry · Mathematics 2010-08-31 Renata Grimaldi , Pierre Pansu

The purpose of this paper is to study the canonical foliations of a quaternion CR-submanifold of an almost quaternion Kaehler product manifold.

Differential Geometry · Mathematics 2009-12-02 Gabriel Eduard Vilcu

In this paper we survey on some recent results on Riemannian orbifolds and singular Riemannian foliations and combine them to conclude the existence of closed geodesics in the leaf space of some classes of singular Riemannian foliations…

Differential Geometry · Mathematics 2012-01-30 Marcos M. Alexandrino , Miguel Angel Javaloyes

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…

Differential Geometry · Mathematics 2011-07-14 Marcos M. Alexandrino

We construct spectral triples in a sense of noncommutative differential geometry, associated with a Riemannian foliation on a compact manifold, and describe its dimension spectrum.

dg-ga · Mathematics 2008-02-03 Yuri A. Kordyukov

In this paper we describe the classification of all the geometric fibrations of a closed flat Riemannian 4-manifold over a 1-orbifold.

Geometric Topology · Mathematics 2013-06-28 Thomas P. Lambert , John G. Ratcliffe , Steven T. Tschantz