Results 51 to 60 of about 3,198,197 (181)

On an evolution equation in sub-Finsler geometry

open access: yesAnalysis and Geometry in Metric Spaces
We study the gradient flow of an energy with mixed homogeneity, which is at the interface of Finsler and sub-Riemannian geometry.
Garofalo Nicola
doaj   +1 more source

Heat content asymptotics in sub-Riemannian geometry

open access: yes, 2021
Sub-Riemannian geometry is a particularly rich class of metric structures, which generalizes Riemannian geometry, where a smoothly varying metric is defined only on a subset of preferred directions of the tangent space at each point of a smooth manifold ...
Rossi, Tommaso
core  

On some synthetic curvature conditions in sub-Riemannian geometry

open access: yes, 2023
reservedIn recent years there has been much interest in generalizing the notion of Ricci curvature to spaces more general than Riemannian manifolds. In one direction some differential invariants generalizing the Ricci tensor have been introduced for ...
STERZI, DARIO
core  

Zeta function rigidity : a view from noncommutative geometry [PDF]

open access: yes, 2011
In this thesis we study the zeta function formalism of finitely summable spectral triples in noncommutative geometry introduced by Alain Connes in 1995.
de Jong, J.W.W.   +2 more
core   +1 more source

Corrections to: ``Sub-Riemannian geometry''

open access: yesJournal of Differential Geometry, 1989
An error in the proof of Corollary 6.2 of [1] has been pointed out by Gerard Ben-Arous. The computation of M(x,λ) in the case λo = 0 on p. 243 is incorrect, because M(x,λ) = 0 when λ0 = 0 and λjg (x) = 0 for all k. (There is also a factor of \ missing in the formula as stated for λ0 φ 0, but this is not significant.) Thus when applying the Pontryagin ...
openaire   +2 more sources

A connection theoretic approach to sub-Riemannian geometry [PDF]

open access: yesJournal of Geometry and Physics, 2003
We use the notion of generalized connection over a bundle map in order to present an alternative approach to sub-Riemannian geometry. Known concepts, such as normal and abnormal extremals, will be studied in terms of this new formalism. In particular, some necessary and sufficient conditions for the existence of abnormal extremals will be derived.
openaire   +2 more sources

Uniform Gaussian Bounds for Subelliptic Heat Kernels and an Application to the Total Variation Flow of Graphs over Carnot Groups

open access: yesAnalysis and Geometry in Metric Spaces, 2013
In this paper we study heat kernels associated with a Carnot group G, endowed with a family of collapsing left-invariant Riemannian metrics σε which converge in the Gromov- Hausdorff sense to a sub-Riemannian structure on G as ε→ 0.
Capogna Luca   +2 more
doaj   +1 more source

Subdifferentials and minimizing Sard conjecture in sub-Riemannian geometry

open access: yesJournal de l’École polytechnique — Mathématiques, 2023
We use techniques from nonsmooth analysis and geometric measure theory to provide new examples of complete sub-Riemannian structures satisfying the Minimizing Sard conjecture. In particular, we show that complete sub-Riemannian structures associated with distributions of co-rank 2
openaire   +3 more sources

Left-invariant paracontact metric structure on a group Sol

open access: yesДифференциальная геометрия многообразий фигур
Among Thurston's famous list of eight three-dimensional geometries is the geometry of the manifold Sol. The variety Sol is a connected simply connected Lie group of real matrices of a special form.
M. V. Sorokina, O. P. Surina
doaj   +1 more source

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