Fuglede's conjecture on cyclic groups of order $p^{n}q$

Romanos-Diogenes Malikiosis, Mihail N. Kolountzakis

We show that the spectral set conjecture by Fuglede holds in the setting of cyclic groups of order $p^{n}q$, where $p$, $q$ are distinct primes and $n\ge 1$. This means that a subse…