ðɪs ɪz ðə dʒˈɛnɚɹəl fˈɔːɹmjʊlə fɚɹə kˈɑːnɪk sˈɛkʃən ðæt hɐz wˈʌn fˈoʊkəs æt ðɪ ˈɔːɹɪdʒˌɪn; ˈiː ˈiːkwəlz zˈiəɹoʊ kˌɔːɹɪspˈɑːndz tʊ ɐ sˈɜːkəl, zˈiəɹoʊ
This is the general formula for a conic section that has one focus at the origin; e = 0 corresponds to a circle, 0 <