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صفحه نخست /NORDHAUS-GADDUM INEQUALITIES ...
عنوان NORDHAUS-GADDUM INEQUALITIES FOR DOMINATION AND PACKING PARAMETERS IN GRAPHS
نوع پژوهش مقاله ارائه شده
کلیدواژه‌ها Nordhaus-Gaddum inequality, open packing number, packing number, total domination number
چکیده We study the Nordhaus-Gaddum type results for $(k,k,j)$ and investigate them for the $k$-limited packing and $k$-total limited packing numbers in graphs. As the special cases $(k,k,j)=(1,1,0)$ and $(k,k,j)=(1,2,0)$ we give upper bounds on $‎\gamma‎_{t}(G)‎‎+‎\gamma‎_{t}(‎\overline{G})‎$ and $\gamma‎_{‎\times2‎}(G)+\gamma‎_{‎\times2‎}(\overline{G})$, respectively, stronger than those conjectured by Harary and Haynes (1996). Moreover, we establish upper bounds on the sum and product of packing and open packing numbers and characterize all graphs attaining these bounds.
پژوهشگران دوستعلی مژده (نفر دوم)، بابک صمدی (نفر اول)