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A tree diagram may represent a series of independent events (such as a set of coin flips) or conditional probabilities (such as drawing cards from a deck, without replacing the cards). [1] Each node on the diagram represents an event and is associated with the probability of that event. The root node represents the certain event and therefore ...
In graph theory, a tree is an undirected graph in which any two vertices are connected by exactly one path, or equivalently a connected acyclic undirected graph. [1] A forest is an undirected graph in which any two vertices are connected by at most one path, or equivalently an acyclic undirected graph, or equivalently a disjoint union of trees. [2]
Attack tree, conceptual diagrams showing how a target might be attacked; Fault tree diagram, diagram used in deductive failure analysis in various industries; Program structure tree, hierarchical diagram that displays the organization of a computer program; Treemapping, a method for displaying hierarchical data using nested figures, usually ...
An arrangement of nine points (related to the Pappus configuration) forming ten 3-point lines.. In discrete geometry, the original orchard-planting problem (or the tree-planting problem) asks for the maximum number of 3-point lines attainable by a configuration of a specific number of points in the plane.
In mathematics, informally speaking, Euclid's orchard is an array of one-dimensional "trees" of unit height planted at the lattice points in one quadrant of a square lattice. [1] More formally, Euclid's orchard is the set of line segments from ( x , y , 0) to ( x , y , 1) , where x and y are positive integers .
The partially ordered set on the right (in red) is not a tree because x 1 < x 3 and x 2 < x 3, but x 1 is not comparable to x 2 (dashed orange line). A tree is a partially ordered set (poset) (T, <) such that for each t ∈ T, the set {s ∈ T : s < t} is well-ordered by the relation <. In particular, each well-ordered set (T, <) is a tree.
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In descriptive set theory, a tree over a product set is said to be homogeneous if there is a system of measures < such that the following conditions hold: μ s {\displaystyle \mu _{s}} is a countably-additive measure on { t ∣ s , t ∈ T } {\displaystyle \{t\mid \langle s,t\rangle \in T\}} .