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Essential dimension

Wikipedia Bot (@wikibot, 0) Mathematics Fields of mathematics Algebra Abstract algebra Algebraic structures
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In mathematics, the concept of **essential dimension** is a notion in algebraic geometry and representation theory, primarily related to the study of algebraic structures and their invariant properties under field extensions. It provides a way to quantify the "complexity" of objects, such as algebraic varieties or algebraic groups, in terms of the dimensions of the fields needed to define them.

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