Search results for " Lie"

Du comté d'Argyle au royaume de Saba : Nodier et l'Écosse des origines

2011

Autre compte rendu d'Hélène Védrine (revue Romantisme) : "L’article de Sébastien Vacelet continue cette réflexion sur l’écriture viatique et son rapport à l’espace, en s’intéressant à la trilogie écossaise de Nodier : Promenade de Dieppe aux montagnes d’Écosse, Trilby et La Fée aux miettes. Cet article extrêmement renseigné – Sébastien Vacelet est l’auteur d’une thèse sur l’Écosse des romantiques dirigée par Georges Zaragoza et a organisé à Dijon une récente journée d’études sur le même thème qui fera l’objet du volume 3 des Cahiers d’études nodiéristes – montre comment les connaissances historiques et livresques de Nodier sur l’Écosse servent à bâtir une fiction des origines qui gomme les …

Baltu filoloģija, 30, sēj., Nr. 1/2

2021

Publisko bibliotēku pakalpojumu lietderība: nelietotāju viedoklis

2022

Bakalaura darba “Publisko bibliotēku pakalpojumu lietderība: nelietotāju viedoklis” mērķis ir noskaidrot publisko bibliotēku nelietotāju viedokli par bibliotēku piedāvātajiem pakalpojumiem, uzzināt galvenos publiskās bibliotēkas neapmeklēšanas iemeslus un apkopot iespējamos motivācijas celšanas faktorus, kas veicinātu publiskās bibliotēkas nelietotājiem apmeklēt bibliotēkas un izmantot to pakalpojumus. Papildus noskaidrot publisko bibliotēku veiktās piesaistes aktivitātes un pasākumus. Pētījumā izmantotas kvalitatīvās un kvantitatīvās pētniecības metodes. Interviju rezultāti ļaus noskaidrot publisko bibliotēku izmantotās metodes publisko bibliotēku nelietotāju piesaistīšanā. Bibliotēku neli…

Zvaigžņotā Debess: 2011/12, Ziema (214)

2011

Saturs: Gamma staru astronomijas problēmas ; Apollo-14 Mēness ekspedīcija ; A.Laure. Protoplanetāro miglāju stadija zvaigžņu evolūcijā ; A.A. Jaunumi īsumā: Oglekļa zvaigzne un rentgenstaru avots ; A.Alksnis. Heršels ielūkojas Miras galvā ; D.Docenko. Jauns dziļš debess apskats WiggleZ ir pabeigts: gaidām rezultātus ; A.A. Jaunumi īsumā: Pundurplanēta Erīda ir precīzi izmērīta. Atvērto durvju dienā Garhingā... ; M.Gertāns. Iepazīstot Kenedija kosmosa centru un atvadoties no Space Shuttle ; J.Dambītis. Ievērojams Latvijas matemātiķis – docents Nikolajs Brāzma (1913-1966) ; J.Jansons. Fiziķu centieni 1950.-1960. gados atgriezt fundamentālo zinātni Universitātē ; V.Fļorovs, A.Cēbers, D.Bočarov…

Cocharacters of group graded algebras and multiplicities bounded by one

2017

Let G be a finite group and A a G-graded algebra over a field F of characteristic zero. We characterize the (Formula presented.)-ideals (Formula presented.) of graded identities of A such that the multiplicities (Formula presented.) in the graded cocharacter of A are bounded by one. We do so by exhibiting a set of identities of the (Formula presented.)-ideal. As a consequence we characterize the varieties of G-graded algebras whose lattice of subvarieties is distributive.

Singular quadratic Lie superalgebras

2012

In this paper, we give a generalization of results in \cite{PU07} and \cite{DPU10} by applying the tools of graded Lie algebras to quadratic Lie superalgebras. In this way, we obtain a numerical invariant of quadratic Lie superalgebras and a classification of singular quadratic Lie superalgebras, i.e. those with a nonzero invariant. Finally, we study a class of quadratic Lie superalgebras obtained by the method of generalized double extensions.

Lie properties of symmetric elements in group rings

2009

Abstract Let ∗ be an involution of a group G extended linearly to the group algebra KG . We prove that if G contains no 2-elements and K is a field of characteristic p ≠ 2 , then the ∗-symmetric elements of KG are Lie nilpotent (Lie n -Engel) if and only if KG is Lie nilpotent (Lie n -Engel).

A note on the Schur multiplier of a nilpotent Lie algebra

2011

For a nilpotent Lie algebra $L$ of dimension $n$ and dim$(L^2)=m$, we find the upper bound dim$(M(L))\leq {1/2}(n+m-2)(n-m-1)+1$, where $M(L)$ denotes the Schur multiplier of $L$. In case $m=1$ the equality holds if and only if $L\cong H(1)\oplus A$, where $A$ is an abelian Lie algebra of dimension $n-3$ and H(1) is the Heisenberg algebra of dimension 3.

On the quasi-isometric and bi-Lipschitz classification of 3D Riemannian Lie groups.

2021

AbstractThis note is concerned with the geometric classification of connected Lie groups of dimension three or less, endowed with left-invariant Riemannian metrics. On the one hand, assembling results from the literature, we give a review of the complete classification of such groups up to quasi-isometries and we compare the quasi-isometric classification with the bi-Lipschitz classification. On the other hand, we study the problem whether two quasi-isometrically equivalent Lie groups may be made isometric if equipped with suitable left-invariant Riemannian metrics. We show that this is the case for three-dimensional simply connected groups, but it is not true in general for multiply connec…

Solvable Extensions of Nilpotent Complex Lie Algebras of Type {2n,1,1}

2018

We investigate derivations of nilpotent complex Lie algebras of type {2n, 1, 1} with the aim to classify nilpotent complex Lie algebras the commutator ideals of which have codimension one and are nilpotent Lie algebras of type {2n, 1, 1}