Preprint
Sep 2026
Regular sets of circulant quartic graphs
For a graph $\Gamma=(V,E)$ and nonnegative integers $a$ and $b$, a nonempty proper subset $C \subset V$ is called an $(a,b)$-regular set if every vertex in $C$ has exactly $a$ neighbors in $C$, and every vertex in $V\setminus C$ has exactly $b$ neighbors in $C$. In this paper, we study the existence of such sets in con...
A. Abdollahi, J.Bagherian, F. Jafari et al.
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