DBESJ1(3)

SYNOPSIS
DOUBLE PRECISION FUNCTION DBESJ1 (X)

NAME
dbesj1 - Compute the Bessel function of the first kind of order one.

LIBRARY
SLATEC (FNLIB)

CATEGORY
C10A1

TYPE
DOUBLE PRECISION (BESJ1-S, DBESJ1-D)

KEYWORDS
BESSEL FUNCTION, FIRST KIND, FNLIB, ORDER ONE, SPECIAL FUNCTIONS

AUTHOR
Fullerton, W., (LANL)

DESCRIPTION
DBESJ1(X) calculates the double precision Bessel function of the first kind of order one for double precision argument X. Series for BJ1 on the interval 0. to 1.60000E+01 with weighted error 1.16E-33 log weighted error 32.93 significant figures required 32.36 decimal places required 33.57

REFERENCES
(NONE)

ROUTINES CALLED
D1MACH, D9B1MP, DCSEVL, INITDS, XERMSG

REVISION HISTORY (YYMMDD)
780601 DATE WRITTEN
890531 Changed all specific intrinsics to generic. (WRB)
890531 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)
910401 Corrected error in code which caused values to have the wrong sign for arguments less than 4.0. (WRB)