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- *DECK CGAMR
- COMPLEX FUNCTION CGAMR (Z)
- C***BEGIN PROLOGUE CGAMR
- C***PURPOSE Compute the reciprocal of the Gamma function.
- C***LIBRARY SLATEC (FNLIB)
- C***CATEGORY C7A
- C***TYPE COMPLEX (GAMR-S, DGAMR-D, CGAMR-C)
- C***KEYWORDS FNLIB, RECIPROCAL GAMMA FUNCTION, SPECIAL FUNCTIONS
- C***AUTHOR Fullerton, W., (LANL)
- C***DESCRIPTION
- C
- C CGAMR(Z) calculates the reciprocal gamma function for COMPLEX
- C argument Z. This is a preliminary version that is not accurate.
- C
- C***REFERENCES (NONE)
- C***ROUTINES CALLED CLNGAM, XERCLR, XGETF, XSETF
- C***REVISION HISTORY (YYMMDD)
- C 770701 DATE WRITTEN
- C 861211 REVISION DATE from Version 3.2
- C 891214 Prologue converted to Version 4.0 format. (BAB)
- C***END PROLOGUE CGAMR
- COMPLEX Z, CLNGAM
- C***FIRST EXECUTABLE STATEMENT CGAMR
- CGAMR = (0.0, 0.0)
- X = REAL (Z)
- IF (X.LE.0.0 .AND. AINT(X).EQ.X .AND. AIMAG(Z).EQ.0.0) RETURN
- C
- CALL XGETF (IROLD)
- CALL XSETF (1)
- CGAMR = CLNGAM(Z)
- CALL XERCLR
- CALL XSETF (IROLD)
- CGAMR = EXP (-CGAMR)
- C
- RETURN
- END
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