DPOCH(3)

SYNOPSIS
DOUBLE PRECISION FUNCTION DPOCH (A, X)

NAME
dpoch - Evaluate a generalization of Pochhammer's symbol.

LIBRARY
SLATEC (FNLIB)

CATEGORY
C1, C7A

TYPE
DOUBLE PRECISION (POCH-S, DPOCH-D)

KEYWORDS
FNLIB, POCHHAMMER, SPECIAL FUNCTIONS

AUTHOR
Fullerton, W., (LANL)

DESCRIPTION
Evaluate a double precision generalization of Pochhammer's symbol (A)-sub-X = GAMMA(A+X)/GAMMA(A) for double precision A and X. For X a non-negative integer, POCH(A,X) is just Pochhammer's symbol. This is a preliminary version that does not handle wrong arguments properly and may not properly handle the case when the result is computed to less than half of double precision.

REFERENCES
(NONE)

ROUTINES CALLED
D9LGMC, DFAC, DGAMMA, DGAMR, DLGAMS, DLNREL, XERMSG

REVISION HISTORY (YYMMDD)
770701 DATE WRITTEN
890531 Changed all specific intrinsics to generic. (WRB)
890911 Removed unnecessary intrinsics. (WRB)
890911 REVISION DATE from Version 3.2
891214 Prologue converted to Version 4.0 format. (BAB)
900315 CALLs to XERROR changed to CALLs to XERMSG. (THJ)
900727 Added EXTERNAL statement. (WRB)