Undirected character

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undirected character

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Definition

Glossary of "Cladistics (2nd ed.)" by Kitching et al. (1998)

  • A character in which the transformations in one direction cost the same number of steps as the transformations in the opposite direction. For example, in the undirected character, 0 <-> 1, the transformations 0 -> 1 and 1 -> 0 each cost the same number of steps. Wagner optimization and Fitch optimization use undirected characters. Cf. directed.

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