Sur les champs de vecteurs invariants sur l'espace tangent d'un espace symétrique réductif
Journal of Lie Theory, Volume 25 (2015) no. 2, pp. 307-326
\def\g{{\frak g}} \def\q{{\frak q}} \def\X{{\frak X }} Let $G$ be a real reductive and connected Lie group and $\sigma$ an involution of $G$. Let $H$ denote the identity component of the group of fixed points of $\sigma$, $\g$ the Lie algebra of $G$ and $\q$ the $-1$ eigenspace of $\sigma$ in $\g$. The group $H$ acts naturally on $\q$ via the adjoint representation. Let $C^{\infty}(\q)^H$ denote the algebra of $H$-invariant smooth functions on $\q$, and $\X(\q)^H$ the space of $H$-invariant smooth vector fields on $\q$. Any vector field $X\in \X(\q)^H$ defines naturally a derivation $D_X$ of the algebra $C^{\infty}(\q)^H$. We prove that the image of the map $X\mapsto D_X$ is the set of derivations of the algebra $C^{\infty}(\q)^H$ preserving the ideal $\Phi C^{\infty}(\q)^H$ of $C^{\infty}(\q)^H$, where $\Phi$ is a discriminant function on $\q$.
DOI:
10.5802/jolt.838
Classification:
17B20, 22F30, 22E30
Keywords: Lie Group, symmetric space, invariant vector field, Taylor expansion
Keywords: Lie Group, symmetric space, invariant vector field, Taylor expansion
@article{JOLT_2015_25_2_a0,
author = {A. Bouaziz and N. Kamoun},
title = {Sur les champs de vecteurs invariants sur l'espace tangent d'un espace sym\'etrique r\'eductif},
journal = {Journal of Lie Theory},
pages = {307--326},
year = {2015},
volume = {25},
number = {2},
doi = {10.5802/jolt.838},
zbl = {1334.22014},
url = {https://jolt.centre-mersenne.org/articles/10.5802/jolt.838/}
}
TY - JOUR AU - A. Bouaziz AU - N. Kamoun TI - Sur les champs de vecteurs invariants sur l'espace tangent d'un espace symétrique réductif JO - Journal of Lie Theory PY - 2015 SP - 307 EP - 326 VL - 25 IS - 2 UR - https://jolt.centre-mersenne.org/articles/10.5802/jolt.838/ DO - 10.5802/jolt.838 ID - JOLT_2015_25_2_a0 ER -
A. Bouaziz; N. Kamoun. Sur les champs de vecteurs invariants sur l'espace tangent d'un espace symétrique réductif. Journal of Lie Theory, Volume 25 (2015) no. 2, pp. 307-326. doi: 10.5802/jolt.838
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