terminated by a segment

(Hypergraph) The mathematical mechanism by which to find the start point and end point of a segment with variable angle by taking another incident segment into account. A segment is terminated by another segment if its start or end point depends on the position of that other segment.

terminating segment

(Hypergraph) A segment of a hyperedge where another segment with variable angle starts or ends. The segment terminates the segment with variable angle.

tip-over

A placement strategy for trees where child nodes are alternately arranged horizontally or vertically.

topology

The structure of a graph. Two drawn graphs have the same topology if you can obtain one drawing from the other by moving the nodes and reshaping the links.

tree

An undirected tree is a connected undirected acyclic graph (that is, a graph that does not contain any cycles). A directed tree is a connected directed graph where each node has exactly one incoming link except the root node, which has no incoming links.