Flowdock
method

atanh

Importance_0
v1_8_7_330 - Show latest stable - 0 notes - Class: Math
atanh(z) public

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# File lib/complex.rb, line 610
  def atanh(z)
    if Complex.generic?(z) and z >= -1 and z <= 1
      atanh!(z)
    else
      log( (1.0+z) / (1.0-z) ) / 2.0
    end
  end
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