Groups with Sharp Character of Type $$\lbrace -1,1,3\rbrace $$
Bulletin of the Iranian Mathematical Society(2022)
Abstract
For a finite group G and its character
$$ \chi $$
, let
$$L_{\chi } $$
be the image of
$$ \chi $$
on
$$ G-\lbrace 1\rbrace $$
. The pair
$$ (G,\chi ) $$
is said to be sharp of type L if
$$|G|=\Pi _{a\in L}(\chi (1)-a)$$
, where
$$ L=L_{\chi } $$
. The pair
$$ (G,\chi ) $$
is said to be normalized if the principal character of G is not an irreducible constituent of
$$ \chi $$
. In this paper, we study normalized sharp pairs of type
$$ L=\lbrace -1,1,3\rbrace $$
proposed by Cameron and Kiyota in [J Algebra 115(1):125–143, 1988], under some additional hypotheses.
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Key words
sharp character,groups,type
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