منابع مشابه
Roman Domination
In his article published in 1999, Ian Stewart discussed a strategy of Emperor Constantine for defending the Roman Empire. Motivated by this article, Cockayne et al.(2004) introduced the notion of Roman domination in graphs. Let G = (V,E) be a graph. A Roman dominating function of G is a function f : V → {0, 1, 2} such that every vertex v for which f(v) = 0 has a neighbor u with f(u) = 2. The we...
متن کاملRoman Medicine
Librarian of the National Library ofWales, and used to illustrate the lecture at Cardiff. The initial article is a scholarly account of Thomas Baskerville, Elizabethan apothecary of Exeter, by Margery Rowe and G. E. Trease. To a Welsh reviewer, another pleasing feature of the Transactions is that it has been printed by J. D. Lewis and Sons Ltd., Gomerian Press, Llandysul. They have already done...
متن کاملCo-Roman domination in trees
Abstract: Let G=(V,E) be a graph and let f:V(G)→{0,1,2} be a function. A vertex v is protected with respect to f, if f(v)>0 or f(v)=0 and v is adjacent to a vertex of positive weight. The function f is a co-Roman dominating function, abbreviated CRDF if: (i) every vertex in V is protected, and (ii) each u∈V with positive weight has a neighbor v∈V with f(v)=0 such that the func...
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ژورنال
عنوان ژورنال: The American Journal of Archaeology and of the History of the Fine Arts
سال: 1889
ISSN: 1540-5079
DOI: 10.2307/495944