نتایج جستجو برای: etvos number

تعداد نتایج: 1168336  

Journal: :Transactions of the American Mathematical Society 1932

Journal: :Mathematics 2021

If G=(VG,EG) is a graph of order n, we call S⊆VG an isolating set if the induced by VG−NG[S] contains no edges. The minimum cardinality G called isolation number G, and it denoted ι(G). It known that ι(G)≤n3 bound sharp. A subset dominating in NG[S]=VG. domination number, γ(G). In this paper, analyze family trees T where ι(T)=γ(T), prove ι(T)=n3 implies ι(T)=γ(T). Moreover, give different equiv...

Journal: :Nagoya Mathematical Journal 1963

Journal: :international journal of industrial mathematics 2015
s. z. aghamohammadi‎

‎the narumi-katayama index was the first topological index defined‎ ‎by the product of some graph theoretical quantities‎. ‎let $g$ be a ‎simple graph with vertex set $v = {v_1,ldots‎, ‎v_n }$ and $d(v)$ be‎ ‎the degree of vertex $v$ in the graph $g$‎. ‎the narumi-katayama ‎index is defined as $nk(g) = prod_{vin v}d(v)$‎. ‎in this paper,‎ ‎the narumi-katayama index is generalized using a $n$-ve...

Journal: :transactions on combinatorics 2013
jafar amjadi hossein karami seyed mahmoud sheikholeslami lutz volkmann

a {em roman dominating function} on a graph $g = (v ,e)$ is a function $f : vlongrightarrow {0, 1, 2}$ satisfying the condition that every vertex $v$ for which $f (v) = 0$ is adjacent to at least one vertex $u$ for which $f (u) = 2$. the {em weight} of a roman dominating function is the value $w(f)=sum_{vin v}f(v)$. the roman domination number of a graph $g$, denoted by $gamma_r(g)$, equals the...

Journal: :international journal of industrial engineering and productional research- 0
navid khademi département economie-gestion, ecole normale supérieure de cachan, france afshin shariat mohaymany iran university of science and technology jalil shahi iran university of science and technology mojtaba rajabi iran university of science and technology

most of the researches in the domain of fuzzy number comparisons serve the fuzzy number ordering purpose. for making a comparison between two fuzzy numbers, beyond the determination of their order, it is needed to derive the magnitude of their order. in line with this idea, the concept of inequality is no longer crisp however it becomes fuzzy in the sense of representing partial belonging or de...

Journal: :iranian journal of mathematical chemistry 2014
janez zerovnik darja rupnik poklukar

one of the generalizations of the wiener number to weighted graphs is to assign probabilities to edges, meaning that in nonstatic conditions the edge is present only with some probability. the reliability wiener number is defined as the sum of reliabilities among pairs of vertices, where the reliability of a pair is the reliability of the most reliable path. closed expressions are derived for t...

Journal: :iranian biomedical journal 0
soroush sardari drug design and bioinformatics unit, medical biotechnology dept., pasteur institute of iran, tehran 13164, iran

molecules are the basic and most important players of life. molecules are composed of atoms, and each molecule has two main specifications or inheritances that are structures, and in biomedical applications, biological function. this dichotomy can be compared to living organisms or humans whom possess genotype and phenotype. each of the two main inherited elements contains a variety of feature ...

Journal: :مدیریت دارایی و تأمین مالی 0

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