dbesj0.f
DOUBLE PRECISION FUNCTION DBESJ0 (X)
C***BEGIN PROLOGUE DBESJ0
C***PURPOSE Compute the Bessel function of the first kind of order
C zero.
C***LIBRARY SLATEC (FNLIB)
C***CATEGORY C10A1
C***TYPE DOUBLE PRECISION (BESJ0-S, DBESJ0-D)
C***KEYWORDS BESSEL FUNCTION, FIRST KIND, FNLIB, ORDER ZERO,
C SPECIAL FUNCTIONS
C***AUTHOR Fullerton, W., (LANL)
C***DESCRIPTION
C
C DBESJ0(X) calculates the double precision Bessel function of
C the first kind of order zero for double precision argument X.
C
C Series for BJ0 on the interval 0. to 1.60000E+01
C with weighted error 4.39E-32
C log weighted error 31.36
C significant figures required 31.21
C decimal places required 32.00
C
C***REFERENCES (NONE)
C***ROUTINES CALLED D1MACH, D9B0MP, DCSEVL, INITDS
C***REVISION HISTORY (YYMMDD)
C 770701 DATE WRITTEN
C 890531 Changed all specific intrinsics to generic. (WRB)
C 890531 REVISION DATE from Version 3.2
C 891214 Prologue converted to Version 4.0 format. (BAB)
C***END PROLOGUE DBESJ0