# ctanh.f

          COMPLEX FUNCTION CTANH (Z)
    C***BEGIN PROLOGUE  CTANH
    C***PURPOSE  Compute the complex hyperbolic tangent.
    C***LIBRARY   SLATEC (FNLIB)
    C***CATEGORY  C4C
    C***TYPE      COMPLEX (CTANH-C)
    C***KEYWORDS  ELEMENTARY FUNCTIONS, FNLIB, HYPERBOLIC TANGENT
    C***AUTHOR  Fullerton, W., (LANL)
    C***DESCRIPTION
    C
    C CTANH(Z) calculates the complex hyperbolic tangent of complex
    C argument Z.  Z is in units of radians.
    C
    C***REFERENCES  (NONE)
    C***ROUTINES CALLED  CTAN
    C***REVISION HISTORY  (YYMMDD)
    C   770401  DATE WRITTEN
    C   861211  REVISION DATE from Version 3.2
    C   891214  Prologue converted to Version 4.0 format.  (BAB)
    C***END PROLOGUE  CTANH