hiː wʌz ɐn ɪnvˈaɪɾᵻd spˈiːkɚɹ æt ðɪ ˌɪntɚnˈæʃənəl kˈɑːŋɡɹəs ʌv mˌæθɪmɐtˈɪʃənz, hˈɛld ɪn bˈɜːkli, kˌælɪfˈoːɹniə ɪn nˈaɪntiːnhˈʌndɹɪd ˈeɪɾi sˈɪks.
He was an invited speaker at the International Congress of Mathematicians, held in Berkeley, California in 1986.