wiː ɑːɹ ˈɪntɹɛstᵻd ɪnðɪ ɪkwˈɪvələns ðæt klˈeɪmz ðˈæt, ɪf "ðə pˈɛɹ ɪz əbzˈɜːvəbəl" ænd ˈɔːl ðɪ ˈaɪdʒənvˌæljuːz ʌv hæv mˈæɡnɪtˌuːd lˈɛs ðɐn ɪz stˈeɪbəl, ðˈɛn ðə juːnˈiːk səlˈuːʃən ʌv
We are interested in the equivalence that claims that, if "The pair  is observable" and all the eigenvalues of  have magnitude less than  ( is stable), then the unique solution of