besk1.f
FUNCTION BESK1 (X)
C***BEGIN PROLOGUE BESK1
C***PURPOSE Compute the modified (hyperbolic) Bessel function of the
C third kind of order one.
C***LIBRARY SLATEC (FNLIB)
C***CATEGORY C10B1
C***TYPE SINGLE PRECISION (BESK1-S, DBESK1-D)
C***KEYWORDS FNLIB, HYPERBOLIC BESSEL FUNCTION,
C MODIFIED BESSEL FUNCTION, ORDER ONE, SPECIAL FUNCTIONS,
C THIRD KIND
C***AUTHOR Fullerton, W., (LANL)
C***DESCRIPTION
C
C BESK1(X) computes the modified (hyperbolic) Bessel function of third
C kind of order one for real argument X, where X .GT. 0.
C
C Series for BK1 on the interval 0. to 4.00000D+00
C with weighted error 7.02E-18
C log weighted error 17.15
C significant figures required 16.73
C decimal places required 17.67
C
C***REFERENCES (NONE)
C***ROUTINES CALLED BESI1, BESK1E, CSEVL, INITS, R1MACH, XERMSG
C***REVISION HISTORY (YYMMDD)
C 770401 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 900326 Removed duplicate information from DESCRIPTION section.
C (WRB)
C***END PROLOGUE BESK1