sˈɪns ðə wˈeɪl ɡɹˈuːp ˈækts baɪ ɹᵻflˈɛkʃənz ɔnðə sˌiːˌɛsˈeɪ, ðeɪ ɑːɹ aɪsˈɑːmətɹiz, sˌoʊ ðə dᵻɡɹˈiː tˈuː ɪnvˈɛɹiənt pˌɑːlɪnˈoʊmɪəl ɪz wˌɛɹ ɪz ðə dᵻmˈɛnʃən ʌvðə sˌiːˌɛsˈeɪ , ˈɔːlsoʊ nˈoʊn æz ðə ɹˈæŋk ʌvðə lˈaɪ ˈældʒᵻbɹə.
Since the Weyl group acts by reflections on the CSA, they are isometries, so the degree 2 invariant polynomial is  where  is the dimension of the CSA , also known as the rank of the Lie algebra.