Relating the outer-independent total Roman domination number with some classical parameters of graphs

Abel Cabrera Martínez, Dorota Kuziak, Ismael G. Yero

For a given graph $G$ without isolated vertex we consider a function $f:V(G)\to \{0,1,2\}$. For every $i\in \{0,1,2\}$, let $V_i=\{v\in V(G):f(v)=i\}$. The function $f…