Results 31 to 40 of about 1,334 (79)

Review of the Coniopterygidae (Neuroptera) of North America With a Revision of the Genus Aleuropteryx

open access: yes, 1980
Psyche: A Journal of Entomology, Volume 87, Issue 3-4, Page 259-298, 1980.
Victor Johnson
wiley   +1 more source

Flat bundles with solvable holonomy

open access: yes, 1981
Let G be a solvable linear Lie group. We show that for every flat pnncipal G-bundle { over a CW-complex M, there is a finite-sheeted covering spacep: M-3 M such that p*C is trivial as a principal G-bundle.
W. Goldman, M. Hirsch
semanticscholar   +1 more source

Realization of square-integrable representations of unimodular Lie groups on ²-cohomology spaces

open access: yes, 1980
An analogue of the "Langlands conjecture" is proved for a large class of connected unimodular Lie groups having square-integrable representations (modulo their centers).
Jonathan Rosenberg
semanticscholar   +1 more source

A metric characterization of Carnot groups

open access: yes, 2014
We give a short axiomatic introduction to Carnot groups and their subRiemannian and subFinsler geometry. We explain how such spaces can be metrically described as exactly those proper geodesic spaces that admit dilations and are isometrically ...
Donne, Enrico Le
core   +1 more source

Metric lines in the jet space

open access: yesAnalysis and Geometry in Metric Spaces
In the realm of sub-Riemannian manifolds, a relevant question is: what are the metric lines (isometric embedding of the real line)? The space of kk-jets of a real function of one real variable xx, denoted by Jk(R,R){J}^{k}\left({\mathbb{R}},{\mathbb{R}}),
Bravo-Doddoli Alejandro
doaj   +1 more source

Examples of naturally reductive pseudo-Riemannian Lie groups

open access: yes, 2011
We provide examples of naturally reductive pseudo-Riemannian spaces, in particular an example of a naturally reductive pseudo-Riemannian 2-step nilpotent Lie group $(N, _N)$, such that $_N$ is invariant under a left action and for which the center is ...
Ovando, Gabriela P.
core   +1 more source

Superrigid subgroups of solvable Lie groups

open access: yes, 1996
Let $\Gamma$ be a discrete subgroup of a simply connected, solvable Lie group~$G$, such that $\Ad_G\Gamma$ has the same Zariski closure as $\Ad G$. If $\alpha \colon \Gamma \to \GL_n(\real)$ is any finite-dimensional representation of~$\Gamma $,we show ...
Communicated Roe Goodman, Dave Witte
core   +4 more sources

Symmetry Algebras of the Canonical Lie Group Geodesic Equations in Dimension Three [PDF]

open access: yes, 2018
For each of the two and three-dimensional indecomposable Lie algebras the geodesic equations of the associated canonical Lie group connection are given.
Ghanam, Ryad, Thompson, Gerard
core   +1 more source

Diophantine property in the group of affine transformations of the line

open access: yes, 2013
We investigate the Diophantine property of a pair of elements in the group of affine transformations of the line. We say that a pair of elements g_1,g_2 in this group is Diophantine if there is a number A such that a product of length l of elements of ...
Varjú, Péter Pál
core   +1 more source

Decay estimates for fractional wave equations on H-type groups

open access: yes, 2016
The aim of this paper is to establish the decay estimate for the fractional wave equation semigroup on H-type groups given by $e^{it\Delta^\alpha ...
Song, Manli
core   +2 more sources

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