haʊˈɛvɚ, kˈɑːmplɛks nˈʌmbɚz ɑːɹ ɹˌɛpɹᵻzˈɛntᵻd baɪ tˈuː vˈɛɹɪəbəlz ænd ðˈɛɹfoːɹ tˈuː dᵻmˈɛnʃənz; ðɪs mˈiːnz ðæt ɹˌɛpɹᵻzˈɛntɪŋ ɐ kˈɑːmplɛks fˈʌŋkʃən mˈoːɹ pɹɪsˈaɪsli, ɐ kˈɑːmplɛksvˈæljuːd fˈʌŋkʃən ʌv wˈʌn kˈɑːmplɛks vˈɛɹɪəbəl ɹᵻkwˈaɪɚz ðə vˌɪʒuːəlᵻzˈeɪʃən ʌv fˈoːɹ dᵻmˈɛnʃənz.
However, complex numbers are represented by two variables and therefore two dimensions; this means that representing a complex function (more precisely, a complex-valued function of one complex variable ) requires the visualization of four dimensions.