Examples of using Such graphs in English and their translations into Russian
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Such graphs are called half-transitive.
The Tutte-Coxeter is one of the 13 such graphs.
Such graphs are excellent spectral expanders.
People who suffer color blindness may have trouble interpreting such graphs.
All such graphs are bipartite, and hence can be colored with only two colors.
All 1-vertex-connected cubic well-covered graphs have this form, and all such graphs are planar.
Such graphs are the molecular graphs of the benzenoid hydrocarbons, a large class of organic molecules.
The specificity of the problem is that the goal is the generation of such graphs with the number of vertices around a billion.
All the cubic distance-regular graphs are known; the Pappus graph is one of the 13 such graphs.
Such graphs are special in the sense that some edges are more important than others for long distance travel e.g. highways.
Taking into account subsequent discoveries,“sufficiently large” is now known to mean that such graphs exist for all n≥ 18.
Such graphs are known to exist in abundance by probabilistic results but the explicit nature of these constructions makes them interesting.
It is known that there exist unit distance graphs requiring five colors in any proper coloring, and that all such graphs can be colored with at most seven colors.
For, in such graphs, there always exists a partition of the faces into two subsets satisfying Grinberg's theorem, regardless of Hamiltonicity Krooss 2004.
Combining the symmetry condition with the restriction that graphs be cubic(i.e. all vertices have degree 3)yields quite a strong condition, and such graphs are rare enough to be listed.
Such graphs are called semi-symmetric graphs and were first studied by Folkman in 1967 who discovered the graph on 20 vertices that now is named after him.
Grötschel(1980) sums up much of the research in this area with the following sentence:“The articles dealing with those graphs… usually exhibit new classes of hypohamiltonian orhypotraceable graphs showing that for certain orders n such graphs indeed exist or that they possess strange and unexpected properties.”.
Since the emergence of the Semantic Web, such graphs can be represented in the Resource Description Framework line of languages by triples of the form, as illustrated in the Notation 3 syntax.
One of these two families is formed by replacing the nodes of a cycle by fragments A and B, with at least two of the fragments being of type A; a graph of this type is planar if andonly if it does not contain any fragments of type B. The other family is formed by replacing the nodes of a path by fragments of type B and C; all such graphs are planar.
Since such graphs have a unique embedding(up to flipping and the choice of the external face), the next bigger graph, if still planar, must be a refinement of the former graph. .
Find the size of the maximum clique in such graph.
Again, any such graph must be a cage.
Every such graph is a partial cube.
In such graph, to one arc number correspond, generally speaking, multiple arcs, one of which is chosen nondeterministically for traversal.
The theorem can be rephrased as stating that every such graph is either planar or it can be decomposed into simpler pieces.
Klostermeyer& Mynhardt(2015a) proved that any such graph must contain triangles and must have maximum vertex degree at least four.
However it is not the smallest such graph: it is known that there is a universal graph for n-vertex trees, with only n vertices and O(n log n) edges, and that this is optimal.
As Robbins proved, every such graph has a partition into a sequence of subgraphs called"ears", in which the first subgraph in the sequence is a cycle and each subsequent subgraph is a path, with the two path endpoints both belonging to earlier ears in the sequence.
Maria Chudnovsky and Shmuel Safra have studied bull-free graphs more generally, showing that any such graph must have either a large clique or a large independent set(that is, the Erdős-Hajnal conjecture holds for the bull graph), and developing a general structure theory for these graphs. .
Hayward(1985) showed, analogously, that every connected and co-connected weakly chordal graph(a graph with no induced cycle or its complement of length greater than four) with four or more vertices has a star cutset or its complement,from which it follows by Chvátal's lemma that every such graph is perfect.