Published online by Cambridge University Press: 28 September 2023
In this note, we bound the metric dimension of the circulant graphs $C_n(1,2,\ldots ,t)$. We shall prove that if
$n=2tk+t$ and if t is odd, then
$\dim (C_n(1,2,\ldots ,t))=t+1$, which confirms Conjecture 4.1.1 in Chau and Gosselin (2017, Opuscula Mathematica 37, 509–534). In Vetrík (2017, Canadian Mathematical Bulletin 60, 206–216; 2020, Discussiones Mathematicae. Graph Theory 40, 67–76), the author has shown that
$\dim (C_n(1,2,\ldots ,t))\leq t+\left \lceil \frac {p}{2}\right \rceil $ for
$n=2tk+t+p$, where
$t\geq 4$ is even,
$1\leq p\leq t+1$, and
$k\geq 1$. Inspired by his work, we show that
$\dim (C_n(1,2,\ldots ,t))\leq t+\left \lfloor \frac {p}{2}\right \rfloor $ for
$n=2tk+t+p$, where
$t\geq 5$ is odd,
$2\leq p\leq t+1$, and
$k\geq 2$.
This work was supported by the Natural Science Foundation of Shandong Province (Grant No. ZR2021QG036).