نتایج جستجو برای: union closed sets conjecture
تعداد نتایج: 414131 فیلتر نتایج به سال:
An antimagic labeling of a graph G is bijection f:E(G)?{1,…,|E(G)|} such that the weights w(x)=?y?xf(y) distinguish all vertices. A well-known conjecture Hartsfield and Ringel (1990) every connected other than K2 admits an labeling. For set distances D, D-antimagic f:V(G)?{1,…,|V(G)|} weight?(x)=?y?ND(x)f(y) distinct for each vertex x, where ND(x)={y?V(G)|d(x,y)?D} D-neigbourhood x. If ND(x)=r,...
Abstract We discuss a new memory-efficient depth-first algorithm and its implementation that iterates over all elements of finite locally branched lattice. This can be applied to face lattices polyhedra various generalizations such as polyhedral complexes subdivisions manifolds, extended tight spans closed sets matroids. Its practical is very fast compared state-of-the-art implementations previ...
The present work aims to exploit the interplay between algebraic properties of rings and graph-theoretic structures some associated graphs. We introduce commutatively closed graphs investigate subsets a ring with help graph theory. In particular, we compute diameter matrix Artinian semisimple algebras.
Non-:::union::: is a complication in the management of patients who have a fracture of the tibia. The records of twenty patients who were treated by intramedullary nailing with reaming for non :::union::: of the tibia were reviewed. The fractures had been treated initially by closed reduction and immobilization in a cast, external fixation, fixation by pins in a plaster cast and dynamic comp...
The purpose of this paper is twofold. First we derive theoretically, using appropriate transformation on x(n), the closed-form solution of the nonlinear difference equation x(n+1) = 1/(±1 + x(n)), n ∈ N_0. The form of solution of this equation, however, was first obtained in [10] but through induction principle. Then, with the solution of the above equation at hand, we prove a case ...
in this paper, we introduce λκ−closed sets and study its properties in generalized topological spaces.
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