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Mathematical terminology. Viewed as a whole, a tree data structure is an ordered tree, generally with values attached to each node. Concretely, it is (if required to be non-empty): A rooted tree with the "away from root" direction (a more narrow term is an "arborescence"), meaning:
Mycorrhizal network. Nutrient exchanges and communication between a mycorrhizal fungus and plants. White threads of fungal mycelium are sometimes visible underneath leaf litter in a forest floor. Mycorrhizal associations have profoundly impacted the evolution of plant life on Earth ever since the initial adaptation of plant life to land.
v − 1. Chromatic number. 2 if v > 1. Table of graphs and parameters. 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 ...
Search algorithm. In computer science, Monte Carlo tree search ( MCTS) is a heuristic search algorithm for some kinds of decision processes, most notably those employed in software that plays board games. In that context MCTS is used to solve the game tree . MCTS was combined with neural networks in 2016 [1] and has been used in multiple board ...
Pando ( Latin for "I spread"), [1] the world's largest tree, is a quaking aspen tree ( Populus tremuloides) located in Sevier County, Utah in the Fishlake National Forest. A male clonal organism, Pando has an estimated 47,000 stems (ramets) that appear as individual trees, but are connected by a root system that spans 106 acres.
Fully qualified domain name. A fully qualified domain name ( FQDN ), sometimes also referred to as an absolute domain name, [1] is a domain name that specifies its exact location in the tree hierarchy of the Domain Name System (DNS). It specifies all domain levels, including the top-level domain and the root zone. [2]
Tree (set theory) A branch (highlighted green) of a set-theoretic tree. Here dots represent elements, arrows represent the order relation, and ellipses and dashed arrows represent (possibly infinite) un-pictured elements and relationships. In set theory, a tree is a partially ordered set ( T , <) such that for each t ∈ T, the set { s ∈ T ...
In graph theory, an arborescence is a directed graph having a distinguished vertex u (called the root) such that, for any other vertex v, there is exactly one directed path from u to v. [1] An arborescence is thus the directed-graph form of a rooted tree, understood here as an undirected graph. [2] [3] An arborescence is also a directed rooted ...