Examples of non-FSZ p-groups for primes greater than three

Abstract

For any prime $p>3$ and $j\in \mathbb{N}$ we construct examples of non-$FS{Z}_{p^j}$ groups of order $p^{p^j+2j-1}$. In the special case of $j=1$ this yields groups of order $p^{p+1}$, which is the minimum possible order for a non-$FSZ$ $p$-group.

9 pages; v2: provided some extra details and fixed a few minor errors