ɪn nˈaɪntiːnhˈʌndɹɪd ˈeɪɾi ˈeɪt, hiː wʌz ɐwˈɔːɹdᵻd ðɪ ɐmˈɛɹɪkən mˌæθɪmˈæɾɪkəl səsˈaɪəɾi lˈiːɹɔɪ pˈiː. stˈiːl pɹˈaɪz fɔːɹ lˈaɪftaɪm ɐtʃˈiːvmənt.
In 1988, he was awarded the American Mathematical Society Leroy P. Steele Prize for Lifetime Achievement.