Extensions of some $2$-groups
IIDA, Youichi
Hokkaido Math. J., Tome 35 (2006) no. 1, p. 181-195 / Harvested from Project Euclid
Let $H$ be a $2$-group with faithful irreducible characters all which are algebraically conjugate to each other, and $\phi$ be any faithful irreducible character of $H$. We are interested in $2$-group $G$ with the normal subgroup $H$ such that induced character $\phi^G$ is irreducible. For example, for $2$-groups $H$ that are the cyclic groups, the dihedral groups $D_n$ and the generalized quaternion groups $Q_n$, all of such $2$-groups $G$ was determined ([3]-[5]). In paticular, we showed that such a $2$-group $G$ for $H=D_n$ or $Q_n$ is uniquely determined. Let $G_t(D_n)$ and $G_t(Q_n)$ be those $2$-groups, respectively. The purpose of this paper is to determine all $2$-groups $G$ for $H=G_t(D_n)$ and $G_t(Q_n)$ and faithful irreducible characters $\phi$ of $H$. In this paper we determine the character tables of $G_t(D_n)$ and $G_t(Q_n)$ in order to show that these groups have faithful irreducible characters all which are algebraically conjugate to each other. As result it is shown that these $2$-groups have identical character tables.
Publié le : 2006-02-15
Classification:  2-group,  group extension,  identical character,  20C15,  20D15
@article{1285766305,
     author = {IIDA, Youichi},
     title = {Extensions of some $2$-groups},
     journal = {Hokkaido Math. J.},
     volume = {35},
     number = {1},
     year = {2006},
     pages = { 181-195},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1285766305}
}
IIDA, Youichi. Extensions of some $2$-groups. Hokkaido Math. J., Tome 35 (2006) no. 1, pp.  181-195. http://gdmltest.u-ga.fr/item/1285766305/