Примеры использования Vertices has на Английском языке и их переводы на Русский язык
{-}
-
Official
-
Colloquial
Every 1-planar graph with n vertices has at most 4n- 8 edges.
In 1973, Stefan Burr and Paul Erdős made the following conjecture: For every integer p there existsa constant cp so that any p-degenerate graph G on n vertices has Ramsey number at most cp n.
It is also true that every graph with n vertices has intersection number at most n2/4.
Only cycles of length 2 are possible in an NNG andeach weakly connected component of an NNG with at least 2 vertices has exactly one 2-cycle.
The complete graph with n vertices has connectivity n- 1, as implied by the first definition.
However, the Herschel graph,another non-Hamiltonian polyhedron with 11 vertices, has fewer edges.
Every maximal outerplanar graph with n vertices has exactly 2n- 3 edges, and every bounded face of a maximal outerplanar graph is a triangle.
A theorem by Nash-Williams says that every k‑regular graph on 2k+ 1 vertices has a Hamiltonian cycle.
If a connected graph with three or more vertices has maximum degree three, then its cutwidth equals the vertex separation number of its line graph.
A graph is said to be k-factor-critical if every subset of n- k vertices has a perfect matching.
Every pseudoforest on a set of n vertices has at most n edges, and every maximal pseudoforest on a set of n vertices has exactly n edges.
As a consequence,they show that every thrackleable graph with n vertices has at most 2n- 3 edges.
For instance the facts that any planar graph with n vertices has at most 3n- 6 edges(except for graphs with fewer than 3 vertices), and that any subgraph of a planar graph is planar, together imply that the planar graphs are(3,6)-sparse.
It follows from Euler's formula that any simplicial 2-sphere with n vertices has 3n- 6 edges and 2n- 4 faces.
Every path graph with four or more vertices has a skew partition, in which the co-disconnected set Y{\displaystyle Y} is one of the interior edges of the path and the disconnected set X{\displaystyle X} consists of the vertices on either side of this edge.
Moon& Moser(1965) showed that any graph with n vertices has at most 3n/3 maximal cliques.
They also show that this median of a set S of vertices in a median graph satisfies the Condorcet criterion for the winner of an election: compared to any other vertex, it is closer to a majority of the vertices in S. As with partial cubes more generally,every median graph with n vertices has at most(n/2) log2 n edges.
Every maximal planar graph with five or more vertices has vertex connectivity 3, 4, or 5.
They are also chordal graphs,graphs in which every cycle of four or more vertices has a diagonal edge connecting two non-consecutive cycle vertices, and the order in which vertices are added in the subdivision process that forms an Apollonian network is an elimination ordering as a chordal graph.
The conjecture was recently proved,showing that every cubic bridgeless graph with n vertices has at least 2n/3656 perfect matchings.
Chordal graphs, the graphs in which every cycle of four or more vertices has a chord, an edge between two vertices that are not consecutive in the cycle.
Thus, the Erdős-Faber-Lovász conjecture is equivalent to the statement that any simple hypergraph with n vertices has chromatic index(edge coloring number) at most n.
Even more generally, a graph is(a,b)-factor-critical if every subset of n- k vertices has an r-factor, that is, it is the vertex set of an r-regular subgraph of the given graph.
He observed that perfect graphs cannot contain odd antiholes,induced subgraphs complementary to odd holes: an odd antihole with 2k+ 1 vertices has clique number k and chromatic number k+ 1, again impossible for a perfect graphs.
K4,4 cannot be partitioned into fewer forests,because any forest on its eight vertices has at most seven edges, while the overall graph has sixteen edges, more than double the number of edges in a single forest.
Streinu and Theran generalize the sparsity conditions defining pseudoforests: they define a graph as being(k,l)-sparse if every nonempty subgraph with n vertices has at most kn- l edges, and(k, l)-tight if it is(k, l)-sparse and has exactly kn- l edges.
Hayward(1985) showed, analogously, that every connected and co-connected weakly chordal graph(a graph with no induced cycle orits 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.
Every two non-adjacent vertices have μ common neighbours.
The vertices have values 1 or 3.
In the 6-faced deltahedron, some vertices have degree 3 and some degree 4.