In his early work on von Neumann algebras in the 1970s, he succeeded in obtaining the almost complete classification of injective factors.
ɪn hɪz ˈɜːli wˈɜːk ˌɔn vˈɑːn nˈuːmən ˈældʒᵻbɹəz ɪnðə nˈaɪntiːnhˈʌndɹɪd sˈɛvənti z, hiː səksˈiːdᵻd ɪn əbtˈeɪnɪŋ ðɪ ˈɔːlmoʊst kəmplˈiːt klˌæsɪfɪkˈeɪʃən ʌv ɪndʒˈɛktɪv fˈæktɚz.