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[[Algebra]] ([[Fr]]. ''[[{{Topp}}algèbre]]'') is a branch of [[mathematics]] -- or [[logic]] -- concerned with the properties and relationships of abstract entities represented in symbolic form.{{Bottom}}

==Jacques LacanFormalization==  ===Formalization of Psychoanalysis===In 1955, [[Lacan]] begins to use [[algebraic]] [[symbol]]s -- in an attempt to [[formalize]] [[psychoanalysis]].

==List==[[Image:Lacan---algebra.jpg|thumb|right|[[List of algebraic symbols]]]]The [[algebraic]] [[symbol]]s used by [[Lacan]], which appear principally in the [[matheme]]s, [[schema l]] and the [[graph of desire]], are [[List of Algebraic Symbols|listed belowhere]], together with their most common [[meaning]].  However, it is important to remember that the [[symbol]]s do not always refer to the same concept throughout [[Lacan]]'s work, but are used in different ways as his work develops.  Even other [[symbol]]s which are relatively stable in [[meaning]] are occasionally used in very different ways. Therefore some caution should be exercised when referring to the following list of equivalences.

The difference between upper- and lower-case [[symbol]]s, the difference between italicised and non-italicised [[symbol]]s, the use of the apostrophe, the minus [[sign]], and subscripts; all these details play their part in the [[algebraic]] system.==References== For example the upper<div style="font-case letters usually refer to the [[symbolic]] [[order]], whereas the lowersize:11px" class="references-case letters usually refer to the [[imaginary]]. small">The use of the [[bar]] is also important.<references/></div>