By Shigeo Koshitani and Britta Spaeth

We present a new criterion to predict if a character of a finite group extends. Let *G* be a finite group and *p* a prime. For *N\lhd G*, we consider *p*-blocks *b* and *b'* of *N* and *{\rm N}_N(D)*, respectively, with *(b')^N=b*, where *D* is a defect group of *b'*.... Show more

October 21, 2013

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Clifford theory of characters in induced blocks

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