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Displaying 61 – 80 of 182

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La représentation coadjointe du groupe affine

Mustapha Rais (1978)

Annales de l'institut Fourier

On étudie la représentation coadjointe de certains produits semi-directs M × G L ( n ) (où M est un espace de matrices où G L ( n ) opère) et plus particulièrement celle du groupe affine. Dans ce dernier cas, on donne un calcul explicite de l’inverse d’une application orbitale (correspondant à un point dont le stabilisateur est trivial). Ceci permet de résoudre diverses questions de la théorie des invariants relatives au groupe affine et à certains de ses sous-groupes. Par exemple, on a déterminé par une méthode géométrique...

Lie algebras

George Seligman (1987)

Beiträge zur Algebra und Geometrie = Contributions to algebra and geometry

Non-weight modules over the super Schrödinger algebra

Xinyue Wang, Liangyun Chen, Yao Ma (2024)

Czechoslovak Mathematical Journal

We construct a family of non-weight modules which are free U ( 𝔥 ) -modules of rank 2 over the N = 1 super Schrödinger algebra in ( 1 + 1 ) -dimensional spacetime. We determine the isomorphism classes of these modules. In particular, free U ( 𝔥 ) -modules of rank 2 over 𝔬𝔰𝔭 ( 1 | 2 ) are also constructed and classified. Moreover, we obtain the sufficient and necessary conditions for such modules to be simple.

Currently displaying 61 – 80 of 182