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The [[Oedipus complex]] is, for [[Lacan]], the paradigmatic triangular [[structure]], which contrasts with all [[dual relation]]s (though see the final paragraph below). The key function in the [[Oedipus complex]] is thus that of the [[father]], the third term which transforms the [[dual relation]] between [[mother]] and [[child]] into a [[triad]]ic [[structure]]. The [[Oedipus complex]] is thus nothing less than the passage from the [[imaginary]] [[order]] to the [[symbolic order]], "the conquest of the symbolic relation as such."<ref>{{S3}} p.199</ref> The fact that the passage to the [[symbolic]] passes via a complex sexual [[dialectic]] means that the [[subject]] cannot have access to the [[symbolic order]] without confronting the problem of [[sexual difference]].
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<blockquote>"The Oedipus complex is essential for the human being to be able to accede to a humanized structure of the real."<ref>{{S3}} p.198</ref></blockquote>
This normative function is to be understood in reference to both [[clinic]]al [[structure]]s and the question of [[sexuality]].
=====The Oedipus complex and clinical structures=====