# catanh.f

          COMPLEX FUNCTION CATANH (Z)
    C***BEGIN PROLOGUE  CATANH
    C***PURPOSE  Compute the arc hyperbolic tangent.
    C***LIBRARY   SLATEC (FNLIB)
    C***CATEGORY  C4C
    C***TYPE      COMPLEX (ATANH-S, DATANH-D, CATANH-C)
    C***KEYWORDS  ARC HYPERBOLIC TANGENT, ATANH, ELEMENTARY FUNCTIONS,
    C             FNLIB, INVERSE HYPERBOLIC TANGENT
    C***AUTHOR  Fullerton, W., (LANL)
    C***DESCRIPTION
    C
    C CATANH(Z) calculates the complex arc hyperbolic tangent of Z.
    C
    C***REFERENCES  (NONE)
    C***ROUTINES CALLED  CATAN
    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  CATANH