Representations of the general symmetric group as linear groups in finite and infinite fields
Representations of the general symmetric group as linear groups in finite and infinite fields
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将一般对称群表示为有限域和无限域中的线性群
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通讯作者:
L. Dickson
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作者:
L. Dickson
1. In a series of articles in the Berliner Berichte, beginning in 1896, Frobenius has developed an elaborate theory of group-characters and applied it to the representation of a given finite group Gasa non-modular linear group. Later, Burnside f approached the subject from the standpoint of continuous groups. The writer has shown J that the method employed by Burnside may be replaced by one involving only purely rational processes and hence leading to results valid for a general field. The last treatment, however, expressly excludes the case in which the field has a modulus which divides the order of G. The exclusion of this case is not merely a matter of convenience, nor merely a limitation due to the particular method of treatment ; indeed, § the properties of the group-determinant differ essentially from those holding when the modulus does not divide the order of G.\ Thus when G is of order q !, the general theory gives no information as to the representations in a field having a modulus = q, whereas the case of a small modulus is the most important one for the applications. The present paper investigates the linear homogeneous groups on m variables, with coefficients in a field F, which are simply isomorphic with the symmetric group on q letters. The treatment is elementary and entirely independent of the papers cited above ; in particular, the investigation is made for all moduli without exception. The principal result is the determination of the minimum value of the number of variables. It is shown that m = q — lormëy2, according as F has not or has a modulus p which divides q (§§ 8-21). There