Geodesic
Inequalities involving independence domination, $f$-domination, connected and total $f$-domination numbers
Czechoslovak Mathematical Journal, Tome 50 (2000) no. 2, pp. 321-330.

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Let $f$ be an integer-valued function defined on the vertex set $V(G)$ of a graph $G$. A subset $D$ of $V(G)$ is an $f$-dominating set if each vertex $x$ outside $D$ is adjacent to at least $f(x)$ vertices in $D$. The minimum number of vertices in an $f$-dominating set is defined to be the $f$-domination number, denoted by $\gamma _{f}(G)$. In a similar way one can define the connected and total $f$-domination numbers $\gamma _{c, f}(G)$ and $\gamma _{t, f}(G)$. If $f(x) = 1$ for all vertices $x$, then these are the ordinary domination number, connected domination number and total domination number of $G$, respectively. In this paper we prove some inequalities involving $\gamma _{f}(G), \gamma _{c, f}(G), \gamma _{t, f}(G)$ and the independence domination number $i(G)$. In particular, several known results are generalized.
Classification : 05C69, 05C90, 05C99
Keywords: domination number; independence domination number; $f$-domination number; connected $f$-domination number; total $f$-domination number 
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     title = {Inequalities involving independence domination, $f$-domination, connected and total $f$-domination numbers},
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     url = {http://geodesic.mathdoc.fr/item/CMJ_2000__50_2_a6/}
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Zhou, Sanming. Inequalities involving independence domination, $f$-domination, connected and total $f$-domination numbers. Czechoslovak Mathematical Journal, Tome 50 (2000) no. 2, pp. 321-330. http://geodesic.mathdoc.fr/item/CMJ_2000__50_2_a6/