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Formed by derivation from "[[mathematics]]" and by analogy with [[phoneme]] and [[Lévi-Strauss]]'s [[mytheme]], the term is an equivalent to "[[algebra|mathematical sign]]". It is not used in conventional [[mathematics]].   The term "[[mathème]]" is a neologism which [[Lacan]] derives from the word "[[mathematics]]" -- presumably by analogy with the term ''[[Claude Lévi-Strauss|mytheme]]''.<ref>''Mytheme'' is a term coined by [[Claude Lévi-Strauss]] to denote the basic constituents of mythological systems.</ref>the term is an equivalent to "[[algebra|mathematical sign]]". It is not used in conventional [[mathematics]].