%0 Journal Article %T Sym¨¦trie en Physique: Alg¨¨bres de Lie, Th¨¦orie des groupes et Repr¨¦sentations %A Adil Belhaj %J Physics %D 2012 %I arXiv %X These notes form an introduction to Lie algebras and group theory. Most of the material can be found in many works by various authors given in the list of references. The reader is referred to such works for more detail. %U http://arxiv.org/abs/1205.3335v1