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The [[matheme]] is a concept introduced in the [[{{LB}}|work]] of [[Jacques Lacan]]. The "[[matheme]]" is a neologism coined by [[Jacques Lacan]] in the early 1970s. Formed by derivation from "[[mathematics]]" and by analogy with [[phoneme]] and [[Lévi-Strauss]]'s [[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]], but is part of [[Lacan]]'s [[algebra]].
[[Image:Lacan-schemal.jpg|thumb|150px|right|Schema L]]
# [[Image:Smalla'.gif]], the [[counterpart|other]].
[[Image:SAUSSUREANALGORITHM.gif|thumb|100px|right|Saussurean algorithm|The Saussurean algorithm]]
Perhaps the most familiar [[matheme]] is the "[[matheme|algorithm]]" which in 1957 replaces [[Saussure]]'s simple diagram / arbor with the notion '''S/s'''. In 1957, [[Lacan]] replaces [[Saussure]]'s diagram of the [[sign]] with what is now referred to as the "'''[[Saussurean algorithm]]'''".<ref>{{E}} p.149</ref> The [[matheme]] links the [[law]]s of the [[unconscious]] discovered by [[Freud]] to the [[law]]s of [[language]] ([[metaphor]] and [[metonymy]]).
This is to be understood as demonstrating that the [[signifier]] is above the [[signified]] , showing the primacy of the [[signifier]] (which is capitalized, whereas the [[signifier]] is reduced to mere lower-case italic), and that the two are separated by a [[bar]] that resists [[signification]] and forces the [[signifier]] to [[slip|slide]] endlessly.<ref>{{L}} "[[The Agency of the Letter in the Unconscious or Reason Since Freud|L'instance de la lettre dans l'inconscient ou la raison depuis Freud]]." ''[[Écrits]]''. Paris: Seuil, 1966: 493-528 ["[[The Agency of the Letter in the Unconscious or Reason Since Freud|The agency of the letter in the unconscious or reason since Freud]]." Trans. [[Alan Sheridan]] ''[[Écrits: A Selection]]''. London: Tavistock, 1977; New York: W.W. Norton & Co., 1977: 146-78].</ref>
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* [[Algebra]]
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