DBSK1E(3)

SYNOPSIS
DOUBLE PRECISION FUNCTION DBSK1E (X)

NAME
dbsk1e - Compute the exponentially scaled modified (hyperbolic) Bessel function of the third kind of order one.

LIBRARY
SLATEC (FNLIB)

CATEGORY
C10B1

TYPE
DOUBLE PRECISION (BESK1E-S, DBSK1E-D)

KEYWORDS
EXPONENTIALLY SCALED, FNLIB, HYPERBOLIC BESSEL FUNCTION, MODIFIED BESSEL FUNCTION, ORDER ONE, SPECIAL FUNCTIONS, THIRD KIND

AUTHOR
Fullerton, W., (LANL)

DESCRIPTION
DBSK1E(S) computes the double precision exponentially scaled modified (hyperbolic) Bessel function of the third kind of order one for positive double precision argument X. Series for BK1 on the interval 0. to 4.00000E+00 with weighted error 9.16E-32 log weighted error 31.04 significant figures required 30.61 decimal places required 31.64 Series for AK1 on the interval 1.25000E-01 to 5.00000E-01 with weighted error 3.07E-32 log weighted error 31.51 significant figures required 30.71 decimal places required 32.30 Series for AK12 on the interval 0. to 1.25000E-01 with weighted error 2.41E-32 log weighted error 31.62 significant figures required 30.25 decimal places required 32.38

REFERENCES
(NONE)

ROUTINES CALLED
D1MACH, DBESI1, DCSEVL, INITDS, XERMSG

REVISION HISTORY (YYMMDD)
770701 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)