Results 31 to 40 of about 3,104 (212)

Rigidity of 2-Step Carnot Groups [PDF]

open access: yesThe Journal of Geometric Analysis, 2017
Except for minor polishing this version is enriched with two appendices concerning pseudo H-type algebras with J^2-condition. In Appendix A we relate these algebras to division algebras and their split versions.
Mauricio Godoy Molina   +3 more
openaire   +3 more sources

Laser-induced thermoelectric effects in electrically biased nanoscale constrictions

open access: yesNanophotonics, 2018
Electrically biased metal nanostructures are at the core of innovative multifunctional integrated devices that control the flow of electrons and photons at the nanoscale.
Mennemanteuil Marie-Maxime   +6 more
doaj   +1 more source

Differentiability and ApproximateDifferentiability for Intrinsic LipschitzFunctions in Carnot Groups and a RademacherTheorem

open access: yesAnalysis and Geometry in Metric Spaces, 2014
A Carnot group G is a connected, simply connected, nilpotent Lie group with stratified Lie algebra.We study intrinsic Lipschitz graphs and intrinsic differentiable graphs within Carnot groups.
Franchi Bruno   +2 more
doaj   +1 more source

Convex functions on Carnot groups

open access: yesRevista Matemática Iberoamericana, 2007
We consider the definition and regularity properties of convex functions in Carnot groups. We show that various notions of convexity in the subelliptic setting that have appeared in the literature are equivalent. Our point of view is based on thinking of convex functions as subsolutions of homogeneous elliptic equations.
P. JUUTINEN   +3 more
openaire   +6 more sources

Identifying 1-rectifiable measures in Carnot groups

open access: yesAnalysis and Geometry in Metric Spaces, 2023
We continue to develop a program in geometric measure theory that seeks to identify how measures in a space interact with canonical families of sets in the space. In particular, extending a theorem of M. Badger and R.
Badger Matthew, Li Sean, Zimmerman Scott
doaj   +1 more source

Horizontal semiconcavity for the square of Carnot–Carathéodory distance on step 2 Carnot groups and applications to Hamilton–Jacobi equations [PDF]

open access: yes
We show that the square of Carnot–Carathéodory distance from the origin, in step 2 Carnot groups, enjoys the horizontal semiconcavity (h-semiconcavity) everywhere in the group including the origin. We first give a proof in the case of ideal Carnot groups,
Zhang, Ye, Liu, Qing, Dragoni, Federica
core   +3 more sources

Metric lines in metabelian Carnot groups [PDF]

open access: yes, 2023
This work is devoted to metric lines (isometric embedding of the real line) in metabelian Carnot groups G: we say that a group G is metabelian if $[G,G]$ is abelian.
Bravo Doddoli, Alejandro
core  

Review of Carnot Battery Technology Commercial Development

open access: yesEnergies, 2022
Carnot batteries are a quickly developing group of technologies for medium and long duration electricity storage. It covers a large range of concepts which share processes of a conversion of power to heat, thermal energy storage (i.e., storing thermal ...
Vaclav Novotny   +3 more
doaj   +1 more source

Regularity for quasilinear PDEs in Carnot groups via Riemannian approximation

open access: yesBruno Pini Mathematical Analysis Seminar, 2020
We study the interior regularity of weak solutions to subelliptic quasilinear PDEs in Carnot groups of the formΣi=1m1Xi (Φ(|∇Hu|2)Xiu) = 0. Here ∇Hu = (X1u,...,Xmiu) is the horizontal gradient, δ > 0 and the exponent p ∈ [2, p*), where p* depends on ...
András Domokos, Juan J. Manfredi
doaj   +1 more source

Quasiconformal maps on a 2-step Carnot group

open access: yes, 2019
We find all global quasiconformal maps (with respect to the Carnot metric) on a particular [Formula: see text]-step Carnot group. In particular, all the global quasiconformal maps of this Carnot group permute the left cosets of the center, verifying a ...
Christopher James Gardiner   +1 more
core   +1 more source

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