ðɛɹ ɪz ˈɔːlsoʊ ɐ dᵻskɹˈɪpʃən ʌv æz ɐ pˌɑːlɪnˈoʊmɪəl ˈældʒᵻbɹə ɪn ɐ fˈaɪnaɪt nˈʌmbɚɹ ʌv kˈaʊntəbli ˈɪnfɪnət fˈæmɪliz ʌv dʒˈɛnɚɹˌeɪɾɚz, , wˌɛɹ hæv dᵻɡɹˈiːz ænd ɪz ðə nˈɛɡətˌɪv ʌv ðə nˈætʃɚɹəl dᵻɹˈɪvətˌɪv ˈɑːpɚɹˌeɪɾɚɹ ɔnðə lˈuːp ˈældʒᵻbɹə.
There is also a description of  as a polynomial algebra in a finite number of countably infinite families of generators, , where  have degrees  and  is the (negative of) the natural derivative operator on the loop algebra.