Tree diagram
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The term tree diagram is used in different ways in different disciplines.
- In physics, a tree diagram is an acyclic connected Feynman diagram. The word tree is used just as in graph theory. A tree diagram corresponds to the results obtained from classical physics in which the effects of quantum mechanics are ignored. One does not need to perform any integrals to calculate a tree diagram. The full result for the physical quantity must however include one-loop Feynman diagrams and also more complicated diagrams.
- In linguistics, a tree diagram is one way to visually represent the structure of a sentence (see X-bar theory), a syllable, or phonological feature geometry.
- In statistical methods, a tree diagram is a schematic diagram which shows all possible outcomes of an event and the probabilities of each.
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