SLATEC Routines --- DBESY1 ---

*DECK DBESY1
      DOUBLE PRECISION FUNCTION DBESY1 (X)
C***BEGIN PROLOGUE  DBESY1
C***PURPOSE  Compute the Bessel function of the second kind of order
C            one.
C***LIBRARY   SLATEC (FNLIB)
C***CATEGORY  C10A1
C***TYPE      DOUBLE PRECISION (BESY1-S, DBESY1-D)
C***KEYWORDS  BESSEL FUNCTION, FNLIB, ORDER ONE, SECOND KIND,
C             SPECIAL FUNCTIONS
C***AUTHOR  Fullerton, W., (LANL)
C***DESCRIPTION
C
C DBESY1(X) calculates the double precision Bessel function of the
C second kind of order for double precision argument X.
C
C Series for BY1        on the interval  0.          to  1.60000E+01
C                                        with weighted error   8.65E-33
C                                         log weighted error  32.06
C                               significant figures required  32.17
C                                    decimal places required  32.71
C
C***REFERENCES  (NONE)
C***ROUTINES CALLED  D1MACH, D9B1MP, DBESJ1, 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  DBESY1