Примеры использования Intersection graph на Английском языке и их переводы на Русский язык
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It is easily seen that the intersection graph of these nets is a circle graph. .
The intersection graph of the entire set of 27 lines on a cubic surface is the complement of the Schläfli graph. .
One characterization of a chordal graph is as the intersection graph of connected subgraphs of a tree.
String graphs, the intersection graphs of curves in the plane, include circle graphs as a special case.
For instance, the graph G shown below to the left may be represented as the intersection graph of the set of segments shown below to the right.
At the intersection graph of the table shows the number of techniques that are most likely to eliminate the technical contradiction arose.
In one direction,suppose that G is the intersection graph of a family F of sets whose union U has k elements.
At the intersection graph of the table indicates the number of techniques that are most likely to try to correct the technical contradiction.
Block graphs may be characterized as the intersection graphs of the blocks of arbitrary undirected graphs. .
The problem of finding an intersection representation of a graph with a given number of elements is known as the intersection graph basis problem.
Every circle graph, as an intersection graph of line segments(the chords of a circle), is also a string graph. .
Scheinerman's conjecture(now a theorem)states that every planar graph can be represented as an intersection graph of line segments in the plane.
Indifference graphs are also the intersection graphs of sets of unit intervals, or of properly nested intervals intervals none of which contains any other one.
If a bipartite graph has boxicity two,it can be represented as an intersection graph of axis-parallel line segments in the plane.
Just as chordal graphs are the intersection graphs of subtrees of trees, split graphs are the intersection graphs of distinct substars of star graphs. .
The figure shows a graph with six vertices, anda representation of this graph as an intersection graph of rectangles two-dimensional boxes.
The intersection graph of the twelve lines of the double six configuration is a twelve-vertex crown graph, a bipartite graph in which each vertex is adjacent to five out of the six vertices of the opposite color.
In geometric graph theory, a unit disk graph is the intersection graph of a family of unit disks in the Euclidean plane.
Using this description of the graph, the conjecture may be restated as follows: if some family of sets has n total elements, andany two sets intersect in at most one element, then the intersection graph of the sets may be n-colored.
Permutation graphs may also be defined geometrically, as the intersection graphs of line segments whose endpoints lie on two parallel lines.
Any graph can be represented as an intersection graph, but some important special classes of graphs can be defined by the types of sets that are used to form an intersection representation of them.
In mathematics, Scheinerman's conjecture, now a theorem,states that every planar graph is the intersection graph of a set of line segments in the plane.
Every outerplanar graph can be represented as an intersection graph of axis-aligned rectangles in the plane, so outerplanar graphs have boxicity at most two.
This conjecture was formulated by E. R. Scheinerman in his Ph.D. thesis(1984),following earlier results that every planar graph could be represented as the intersection graph of a set of simple curves in the plane Ehrlich, Even& Tarjan 1976.
The graph of the Erdős-Faber-Lovász conjecture may be represented as an intersection graph of sets: to each vertex of the graph, correspond the set of the cliques containing that vertex, and connect any two vertices by an edge whenever their corresponding sets have a nonempty intersection. .
Colorings of circle graphs may also be used to find book embeddings of arbitrary graphs: if the vertices of a given graph G are arranged on a circle,with the edges of G forming chords of the circle, then the intersection graph of these chords is a circle graph and colorings of this circle graph are equivalent to book embeddings that respect the given circular layout.
Many important graph families can be described as intersection graphs of more restricted types of set families, for instance sets derived from some kind of geometric configuration:An interval graph is defined as the intersection graph of intervals on the real line, or of connected subgraphs of a path graph. .
Dually chordal graphs are the clique graphs of chordal graphs, i.e., the intersection graphs of maximal cliques of chordal graphs. .
The clique graph K(G)can also be characterized as the intersection graph of the maximal cliques of G. A graph H is the clique graph K(G) of another graph if and only if there exists a collection C of cliques in H whose union covers all the edges of H, such that C forms a Helly family.
In this way,the path decomposition nodes containing v correspond to the representative points in the interval for v. The intersection graph of the intervals formed from the vertices of G is an interval graph that contains G as a subgraph.