# dbi.f

          DOUBLE PRECISION FUNCTION DBI (X)
    C***BEGIN PROLOGUE  DBI
    C***PURPOSE  Evaluate the Bairy function (the Airy function of the
    C            second kind).
    C***LIBRARY   SLATEC (FNLIB)
    C***CATEGORY  C10D
    C***TYPE      DOUBLE PRECISION (BI-S, DBI-D)
    C***KEYWORDS  BAIRY FUNCTION, FNLIB, SPECIAL FUNCTIONS
    C***AUTHOR  Fullerton, W., (LANL)
    C***DESCRIPTION
    C
    C DBI(X) calculates the double precision Airy function of the
    C second kind for double precision argument X.
    C
    C Series for BIF        on the interval -1.00000E+00 to  1.00000E+00
    C                                        with weighted error   1.45E-32
    C                                         log weighted error  31.84
    C                               significant figures required  30.85
    C                                    decimal places required  32.40
    C
    C Series for BIG        on the interval -1.00000E+00 to  1.00000E+00
    C                                        with weighted error   1.29E-33
    C                                         log weighted error  32.89
    C                               significant figures required  31.48
    C                                    decimal places required  33.45
    C
    C Series for BIF2       on the interval  1.00000E+00 to  8.00000E+00
    C                                        with weighted error   6.08E-32
    C                                         log weighted error  31.22
    C                        approx significant figures required  30.8
    C                                    decimal places required  31.80
    C
    C Series for BIG2       on the interval  1.00000E+00 to  8.00000E+00
    C                                        with weighted error   4.91E-33
    C                                         log weighted error  32.31
    C                        approx significant figures required  31.6
    C                                    decimal places required  32.90
    C
    C***REFERENCES  (NONE)
    C***ROUTINES CALLED  D1MACH, D9AIMP, DBIE, 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  DBI