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Published online by Cambridge University Press: 22 January 2016
The theory of group characters was originated by G. Frobenius and has been studied by many authors including, above all, I. Schur and W. Burnside. As to the modular theory we owe it to recent works by R. Brauer and his collaborators, including T. Nakayama and C. Nesbitt, which clarified also the connections between the structure theory and the representation theory.
1)
Strictly speaking Kλ
must be replaced by a suitable class of conjugate elements in
which is contained in Kλ.
2) See1).
3) See1).
4) See1).
5) See1).
6) See1).
7) Mr M. Suzuki kindly communicated to me that this is an immediate consequence of Proposition 1 since a defect group is apparently the meet of some Sylow subgroups. (Added on Sep. 3, 1950).