*DECK CASINH
      COMPLEX FUNCTION CASINH (Z)
C***BEGIN PROLOGUE  CASINH
C***PURPOSE  Compute the arc hyperbolic sine.
C***LIBRARY   SLATEC (FNLIB)
C***CATEGORY  C4C
C***TYPE      COMPLEX (ASINH-S, DASINH-D, CASINH-C)
C***KEYWORDS  ARC HYPERBOLIC SINE, ASINH, ELEMENTARY FUNCTIONS, FNLIB,
C             INVERSE HYPERBOLIC SINE
C***AUTHOR  Fullerton, W., (LANL)
C***DESCRIPTION
C
C CASINH(Z) calculates the complex arc hyperbolic sine of Z.
C
C***REFERENCES  (NONE)
C***ROUTINES CALLED  CASIN
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  CASINH
      COMPLEX Z, CI, CASIN
      SAVE CI
      DATA CI /(0.,1.)/
C***FIRST EXECUTABLE STATEMENT  CASINH
      CASINH = -CI*CASIN (CI*Z)
C
      RETURN
      END