BESJ1(3)

SYNOPSIS
FUNCTION BESJ1 (X)

NAME
besj1 - Compute the Bessel function of the first kind of order one.

LIBRARY
SLATEC (FNLIB)

CATEGORY
C10A1

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

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

AUTHOR
Fullerton, W., (LANL)

DESCRIPTION
BESJ1(X) calculates the Bessel function of the first kind of order one for real argument X. Series for BJ1 on the interval 0. to 1.60000D+01 with weighted error 4.48E-17 log weighted error 16.35 significant figures required 15.77 decimal places required 16.89 Series for BM1 on the interval 0. to 6.25000D-02 with weighted error 5.61E-17 log weighted error 16.25 significant figures required 14.97 decimal places required 16.91 Series for BTH1 on the interval 0. to 6.25000D-02 with weighted error 4.10E-17 log weighted error 16.39 significant figures required 15.96 decimal places required 17.08

REFERENCES
(NONE)

ROUTINES CALLED
CSEVL, INITS, R1MACH, XERMSG

REVISION HISTORY (YYMMDD)
780601 DATE WRITTEN
890210 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)
900326 Removed duplicate information from DESCRIPTION section. (WRB)