The distance of a tree is the sum of the distances between all pairs of vertices in the tree. This thesis deals with the problem of determining the trees having minimum and maximum distance within certain subclasses of trees of a fixed order. Using a new approach based on a weaker variant of the well-known dominance order on partitions, the optimal trees with bounded maximum degree and with a given degree sequence are characterized. Moreover, a natural weighted distance problem is solved
AbstractUsing Ore's definition of the distance of spanning trees in a connected graph G, we determin...
AbstractFor any positive integer n and any graph G a set D of vertices of G is a distance-n dominati...
For each given pair of (rooted or unrooted) topological trees with the same number of leaves a stric...
AbstractUsing a weaker variant of the well-known dominance order on partitions, we determine the tre...
AbstractLet G be a tree and k a non-negative integer. We determine best possible upper and lower bou...
AbstractThis paper characterizes binary trees with n leaves, which have the greatest number of subtr...
The subtrees of a tree have been studied from various points of view. In particular, the extremal tr...
We present a question, motivated from chemical graph theory, of maximizing the sum of pairwise dista...
A subtree of a tree is any induced subgraph that is again a tree (i.e., connected). The mean subtree...
AbstractGiven a sequence of numbers al, …, aq, find a binary tree with q leaves minimizing max hl + ...
[[abstract]]Let G be a graph. For two vertices u and v in G, we denote d(u, v) the distance between ...
The sum of distances between vertices of a tree has been considered from many aspects. The question ...
AbstractLet G=(V,E) be a graph without isolated vertices. For a positive integer k, a set S⊆V is a k...
A number of basic results concerning tree optimization problems are presented. As well as treating t...
When considering the number of subtrees of trees, the extremal structures which maximize this number...
AbstractUsing Ore's definition of the distance of spanning trees in a connected graph G, we determin...
AbstractFor any positive integer n and any graph G a set D of vertices of G is a distance-n dominati...
For each given pair of (rooted or unrooted) topological trees with the same number of leaves a stric...
AbstractUsing a weaker variant of the well-known dominance order on partitions, we determine the tre...
AbstractLet G be a tree and k a non-negative integer. We determine best possible upper and lower bou...
AbstractThis paper characterizes binary trees with n leaves, which have the greatest number of subtr...
The subtrees of a tree have been studied from various points of view. In particular, the extremal tr...
We present a question, motivated from chemical graph theory, of maximizing the sum of pairwise dista...
A subtree of a tree is any induced subgraph that is again a tree (i.e., connected). The mean subtree...
AbstractGiven a sequence of numbers al, …, aq, find a binary tree with q leaves minimizing max hl + ...
[[abstract]]Let G be a graph. For two vertices u and v in G, we denote d(u, v) the distance between ...
The sum of distances between vertices of a tree has been considered from many aspects. The question ...
AbstractLet G=(V,E) be a graph without isolated vertices. For a positive integer k, a set S⊆V is a k...
A number of basic results concerning tree optimization problems are presented. As well as treating t...
When considering the number of subtrees of trees, the extremal structures which maximize this number...
AbstractUsing Ore's definition of the distance of spanning trees in a connected graph G, we determin...
AbstractFor any positive integer n and any graph G a set D of vertices of G is a distance-n dominati...
For each given pair of (rooted or unrooted) topological trees with the same number of leaves a stric...