fˈɑːloʊɪŋ ðɪ aɪdˈiəz ʌvðɪ əbˌʌv pɹˈuːf, wiː kæn sˈɛt sˌʌm ɹˈɛfɹəns pˈɔɪnt ˈɪn , ænd dᵻfˈaɪn ɐ fˈʌŋkʃən bˈaɪ
Following the ideas of the above proof, we can set some reference point  in , and define a function  by