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Primitive element (finite field) : ウィキペディア英語版
Primitive element (finite field)
In field theory, a primitive element of a finite field ''GF''(''q'') is a generator of the multiplicative group of the field. In other words, \alpha \in \mathrm(q) is called a primitive element if it is a primitive (''q''-1) root of unity in ''GF''(''q''); this means that all the non-zero elements of \mathrm(q) can be written as \alpha^i for some (positive) integer i.
For example, 2 is a primitive element of the field ''GF''(''3'') and ''GF''(''5''), but not of ''GF''(''7'') since it generates the cyclic subgroup of order 3 ; however, 3 is a primitive element of ''GF''(''7''). The minimal polynomial of a primitive element is a primitive polynomial.
==Properties==


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