Abdollahi, A., Ghoraishi, S. (2013). Noninner automorphisms of finite $p$-groups leaving the center elementwise fixed. International Journal of Group Theory, 2(4), 17-20. doi: 10.22108/ijgt.2013.2761

Alireza Abdollahi; S. Mohsen Ghoraishi. "Noninner automorphisms of finite $p$-groups leaving the center elementwise fixed". International Journal of Group Theory, 2, 4, 2013, 17-20. doi: 10.22108/ijgt.2013.2761

Abdollahi, A., Ghoraishi, S. (2013). 'Noninner automorphisms of finite $p$-groups leaving the center elementwise fixed', International Journal of Group Theory, 2(4), pp. 17-20. doi: 10.22108/ijgt.2013.2761

Abdollahi, A., Ghoraishi, S. Noninner automorphisms of finite $p$-groups leaving the center elementwise fixed. International Journal of Group Theory, 2013; 2(4): 17-20. doi: 10.22108/ijgt.2013.2761

Noninner automorphisms of finite $p$-groups leaving the center elementwise fixed

A longstanding conjecture asserts that every finite nonabelian $p$-group admits a noninner automorphism of order $p$. Let $G$ be a finite nonabelian $p$-group. It is known that if $G$ is regular or of nilpotency class $2$ or the commutator subgroup of $G$ is cyclic, or $G/Z(G)$ is powerful, then $G$ has a noninner automorphism of order $p$ leaving either the center $Z(G)$ or the Frattini subgroup $\Phi(G)$ of $G$ elementwise fixed. In this note, we prove that the latter noninner automorphism can be chosen so that it leaves $Z(G)$ elementwise fixed.

A. Abdollahi (2010). Powerful $p$-groups have noninner automorphisms
of order $p$ and some cohomology. J. Algebra. 323, 779-789

2

A. Abdollahi (2007). Finite $p$-groups of class $2$ have noninner automorphisms of order
$p$. J. Algebra. 312, 876-879

3

A. Abdollahi, M. Ghoraishi and B. Wilkens (2013). Finite $p$-groups of class 3 have noninner automorphisms of order $p$. Beitr. Algebra Geom.. 54 (1), 363-381

4

M. Deaconescu and G. Silberberg (2002). Noninner automorphisms of order $p$ of finite $p$-groups. J. Algebra. 250, 283-287

5

W. Gasch"{u}tz (1966). Nichtabelsche $p$-Gruppen besitzen
"{a}ussere $p$-Automorphismen. J. Algebra. 4, 1-2

6

A. R. Jamali and M. Viseh (2013). On the existence of noinner automorphisms of order two in finite $2$-groups. Bull. Aust. Math. Soc.. 87 (2), 278-287

7

H. Liebeck (1965). Outer automorphisms in nilpotent
$p$-groups of class $2$. J. London Math. Soc.. 40, 268-275

8

P. Schmid (1976). Normal $p$-subgroups in the group of outer automorphisms of a finite $p$-group. Math. Z.. 147 (3), 271-277

9

P. Schmid (1980). A cohomological property of regular $p$-groups. Math. Z.. 175, 1-3