dbsk0e.f
DOUBLE PRECISION FUNCTION DBSK0E (X)
C***BEGIN PROLOGUE DBSK0E
C***PURPOSE Compute the exponentially scaled modified (hyperbolic)
C Bessel function of the third kind of order zero.
C***LIBRARY SLATEC (FNLIB)
C***CATEGORY C10B1
C***TYPE DOUBLE PRECISION (BESK0E-S, DBSK0E-D)
C***KEYWORDS EXPONENTIALLY SCALED, FNLIB, HYPERBOLIC BESSEL FUNCTION,
C MODIFIED BESSEL FUNCTION, ORDER ZERO, SPECIAL FUNCTIONS,
C THIRD KIND
C***AUTHOR Fullerton, W., (LANL)
C***DESCRIPTION
C
C DBSK0E(X) computes the double precision exponentially scaled
C modified (hyperbolic) Bessel function of the third kind of
C order zero for positive double precision argument X.
C
C Series for BK0 on the interval 0. to 4.00000E+00
C with weighted error 3.08E-33
C log weighted error 32.51
C significant figures required 32.05
C decimal places required 33.11
C
C Series for AK0 on the interval 1.25000E-01 to 5.00000E-01
C with weighted error 2.85E-32
C log weighted error 31.54
C significant figures required 30.19
C decimal places required 32.33
C
C Series for AK02 on the interval 0. to 1.25000E-01
C with weighted error 2.30E-32
C log weighted error 31.64
C significant figures required 29.68
C decimal places required 32.40
C
C***REFERENCES (NONE)
C***ROUTINES CALLED D1MACH, DBESI0, DCSEVL, INITDS, XERMSG
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 900315 CALLs to XERROR changed to CALLs to XERMSG. (THJ)
C***END PROLOGUE DBSK0E