The edit distance between two graphs on the same labeled vertex set is the size of the symmetric difference of the edge sets. The distance between a graph, G, and a hereditary property, H, is the minimum of the distance between G and each G′ ∈ H with the same number of vertices. The edit distance function of H is a function of p ∈ [0, 1] and is the limit of the maximum normalized distance betwe...

Let G1 and G2 be two graphs on disjoint sets of n1 and n2 vertices, respectively. The corona of graphs G1 and G2, denoted by G1 ◦ G2, is the graph formed from one copy of G1 and n1 copies of G2 where the i-th vertex of G1 is adjacent to every vertex in the i-th copy of G2. The neighborhood corona of G1 and G2, denoted by G1 ⋄ G2, is the graph obtained by taking one copy of G1 and n1 copies of G...

In a random graph with a spatial embedding, the probability of linking to a particular vertex v decreases with distance, but the rate of decrease may depend on the particular vertex v, and on the direction in which the distance increases. In this article, we consider the question when the embedding can be chosen to be uniform, so the probability of a link between two vertices depends only on th...

We prove the structural result on normal plane maps, which applies to the vertex distance colouring of plane maps. The vertex distance-t chromatic number of a plane graph G with maximum degree ∆(G) ≤ D, D ≥ 12 is proved to be upper bounded by 6+ 2D+12 D−2 ((D−1)(t−1)−1). This improves a recent bound 6 + 3D+3 D−2 ((D − 1)t−1 − 1), D ≥ 8 by Jendrol’ and Skupień, and the upper bound for distance-2...

Abstract. For a connected graph, the distance spectral radius is the largest eigenvalue of its distance matrix. Let U1 2k be the graph obtained from C3 by attaching a path of length n− 3 at one vertex. Let U2 2k be the graph obtained from C3 by attaching a pendant edge together with k − 2 paths of length 2 at the same vertex. In this paper, it is proved that U1 2k (resp., U 2 2k) is the unique ...

If G is a connected graph with vertex set V (G), then the degree distance of G is defined as DD(G) = ∑ {u,v}∈V (G)(deg u + deg v)d(u, v), where deg u is the degree of vertex u, and d(u, v) denotes the distance between u and v. In the chemical literature, DD(G) is better known under ‡Corresponding author. If possible, send your correspondence via e-mail. the name Schultz index. In the class of p...

It is shown that the vertices of benzenoid systems admit a labeling which reflects their distance relations. To every vertex of a molecular graph of a benzenoid hydrocarbon a sequence of zeros and ones (a binary number) can be associated, such that the number of positions in which these sequences differ is equal to the graph-theoretic vertex distance. It is shown by an example that such labelin...

We consider the problem of computing Fréchet distance between two curves for which exact locations vertices are unknown. Each vertex may be placed in a given uncertainty region that vertex, and objective is to place so as minimise distance. This was recently shown NP-hard 2D, it unclear how compute an optimal placement at all. present first general algorithmic framework this problem. prove resu...

Recall that BFS is a special case the general Search-Tree(G,s) algorithm in which we store the vertices that border our growing tree T in a first-in-first-out (FIFO) queue. In this way, the algorithm explores every vertex of distance ` from the source vertex s before we explore any vertex of distance ` + 1, for all `. Its output is a tree T that contains the union of “geodesic” or shortest path...

‎The Steiner distance of a graph‎, ‎introduced by Chartrand‎, ‎Oellermann‎, ‎Tian and Zou in 1989‎, ‎is a natural generalization of the‎ ‎concept of classical graph distance‎. ‎For a connected graph $G$ of‎ ‎order at least $2$ and $Ssubseteq V(G)$‎, ‎the Steiner‎ ‎distance $d(S)$ among the vertices of $S$ is the minimum size among‎ ‎all connected subgraphs whose vertex sets contain $S$‎. ‎Let $...