undouble

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English

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Etymology

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From un- +‎ double.

Verb

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undouble (third-person singular simple present undoubles, present participle undoubling, simple past and past participle undoubled)

  1. (transitive) To undo the doubling of; to unfold, or render single again.
    • 2014, Alexander A. Stepanov, Daniel E. Rose, From Mathematics to Generic Programming, page 54:
      So to simulate this, the iterative version needs to repeatedly “undouble” the value, which it will do by calling a function half.