Total vertex product irregularity strength of graphs

Marcin Anholcer, Azam Sadat Emadi, Doost Ali Mojdeh

Consider a simple graph $G$. We call a labeling $w:E(G)\cup V(G)\to \{1,2,\dots ,s\}$ (\textit{total vertex}) \textit{product-irregular}, if all product degrees $p{d}_G(v)$…