Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Sergio Bermudo"'
Publikováno v:
Mathematical Biosciences and Engineering, Vol 19, Iss 7, Pp 7138-7155 (2022)
In this paper we study the k-domination and total k-domination numbers of catacondensed hexagonal systems. More precisely, we give the value of the total domination number, we find upper and lower bounds for the 2-domination number and the total 2-do
Externí odkaz:
https://doaj.org/article/6f20c38a6a98424399bd24f84fe541ff
Publikováno v:
Axioms, Vol 10, Iss 4, p 265 (2021)
Let G=(V,E) be a graph, and let β∈R. Motivated by a service coverage maximization problem with limited resources, we study the β-differential of G. The β-differential of G, denoted by ∂β(G), is defined as ∂β(G):=max{|B(S)|−β|S|suchthatS
Externí odkaz:
https://doaj.org/article/545ca79961054af0ae740b7613d04b2e
Publikováno v:
Symmetry, Vol 13, Iss 2, p 292 (2021)
We obtain inequalities involving many topological indices in classical graph products by using the f-polynomial. In particular, we work with lexicographic product, Cartesian sum and Cartesian product, and with first Zagreb, forgotten, inverse degree
Externí odkaz:
https://doaj.org/article/39cfe3a0b19d41768a2d04ba09735e76
Publikováno v:
Symmetry, Vol 9, Iss 10, p 205 (2017)
Let G = ( V , E ) be a simple graph with vertex set V and edge set E. Let D be a subset of V, and let B ( D ) be the set of neighbours of D in V ∖ D . The differential ∂ ( D ) of D is defined as | B ( D ) | − | D | . The maximum value of ∂ (
Externí odkaz:
https://doaj.org/article/c03aa27c0dfa42f2a0e3108e26a7bd25
Publikováno v:
Discrete Applied Mathematics. 321:82-89
Publikováno v:
Mathematical Biosciences and Engineering. 19:7138-7155
In this paper we study the $ k $-domination and total $ k $-domination numbers of catacondensed hexagonal systems. More precisely, we give the value of the total domination number, we find upper and lower bounds for the $ 2 $-domination number and th
Publikováno v:
Metaheuristics ISBN: 9783031265037
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::06c87bb5d278ec1ffe561f9af5787ec8
https://doi.org/10.1007/978-3-031-26504-4_47
https://doi.org/10.1007/978-3-031-26504-4_47
Publikováno v:
Discrete Applied Mathematics. 304:153-163
Given two types of graph theoretical parameters ρ and σ , we say that a graph G is ( σ , ρ ) -perfect if σ ( H ) = ρ ( H ) for every non-trivial connected induced subgraph H of G . In this work we characterize ( γ w , τ ) -perfect graphs, (
Publikováno v:
Journal of Mathematical Chemistry. 59:1348-1367
In this paper we answer all the conjectures about the domination number of a catacondensed hexagonal system given in Automated Conjecturing VI: Domination Number of Benzenoids. Moreover, we give lower bounds for the domination number in catacondensed
Publikováno v:
Acta Mathematica Hungarica. 162:364-374
The Hermite–Hadamard inequality was first considered for convex functions and has been studied extensively. Recently, many extensions were given with the use of general convex functions. In this paper we present some variants of the Hermite–Hadam