involutory

English

Adjective

involutory (not comparable)

  1. (mathematics) Of a mapping or transformation: being its own inverse; being an involution.

Noun

involutory (plural involutories)

  1. (mathematics) A linear transformation that is its own inverse, i.e., that has period two. [1]

References
  1. http://mathworld.wolfram.com/Involutory.html
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