Results 91 to 100 of about 32,301 (195)

Filtrations and canonical coordinates on nilpotent Lie groups [PDF]

open access: yesTransactions of the American Mathematical Society, 1978
Let g be a finite-dimensional nilpotent Lie algebra over a field of characteristic zero. Introducing the notion of a positive, decreasing filtration 9 on a, the paper studies the multiplicative structure of the universal enveloping algebra {/(g), and also transformation laws between ^-canonical coordinates of the first and second kind associated with ...
openaire   +1 more source

Existence of isoperimetric regions in sub-Finsler nilpotent groups

open access: yesAnalysis and Geometry in Metric Spaces
We consider a nilpotent Lie group with a bracket-generating distribution ℋ{\mathcal{ {\mathcal H} }} and an asymmetric left-invariant norm ∣⋅∣K{| \cdot | }_{K} induced by a convex body K⊆RkK\subseteq {{\mathbb{R}}}^{k} containing 0 in its interior.
Pozuelo Julián
doaj   +1 more source

A Plancherel Formula for Idyllic Nilpotent Lie Groups [PDF]

open access: yesTransactions of the American Mathematical Society, 1976
A procedure is developed which can be used to compute the Plancherel measure for a certain class of nilpotent Lie groups, including the Heisenberg groups, free groups, two-and three-step groups, the nilpotent part of an Iwasawa decomposition of the R-split form of the classical simple groups
openaire   +1 more source

Solvability and Nilpotency of Lie Algebras in Cryptography and Steganography

open access: yesMathematics
This paper investigates the role of solvable and nilpotent Lie algebras in the domains of cryptography and steganography, emphasizing their potential in enhancing security protocols and covert communication methods.
Amor Hasić   +3 more
doaj   +1 more source

Controllability of systems of a nilpotent Lie group

open access: yes, 1985
Sei W eine Teilmenge der Liealgebra L(G) einer zusammenhängenden Liegruppe G und sei S die durch Ext \({\mathbb{R}}^+W\) in G erzeugte Halbgruppe. Dann heißt das Paar (S,W) das durch W erzeugte System of G. Ein solches System heißt kontrollierbar, wenn \(S=G\) gilt. In diesem Fall läßt sich jedes Element \(g\in G\) in der Form \[ g=Exp t_ 1X_ 1...
Lawson, J.D., Hofmann, K.H., Hilgert, J.
openaire   +1 more source

Estimates for the mixed derivatives of the Green functions on homogeneous manifolds of negative curvature

open access: yesElectronic Journal of Differential Equations, 2004
We consider the Green functions for second-order left-invariant differential operators on homogeneous manifolds of negative curvature, being a semi-direct product of a nilpotent Lie group $N$ and $A=mathbb{R}^+$. We obtain estimates for mixed derivatives
Roman Urban
doaj  

Horizontally Affine Functions on Step-2 Carnot Algebras. [PDF]

open access: yesJ Geom Anal, 2023
Le Donne E, Morbidelli D, Rigot S.
europepmc   +1 more source

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