ðə dˌɛfɪnˈɪʃən ʌv siːkwˈɛnʃəl ˌiːkwɪlˈɪbɹiəm fˈɜːðɚ ɹᵻkwˈaɪɚz ðæt ðɛɹbˈiː ˌɑːɹbɪtɹˈɛɹᵻli smˈɔːl pɚɾɚbˈeɪʃənz ʌv bᵻlˈiːfs ænd ɐsˈoʊsɪˌeɪɾᵻd stɹˈæɾədʒiz wɪððə sˈeɪm pɹˈɑːpɚɾi.
The definition of sequential equilibrium further requires that there be arbitrarily small perturbations of beliefs and associated strategies with the same property.