# bi.f

          FUNCTION BI (X)
    C***BEGIN PROLOGUE  BI
    C***PURPOSE  Evaluate the Bairy function (the Airy function of the
    C            second kind).
    C***LIBRARY   SLATEC (FNLIB)
    C***CATEGORY  C10D
    C***TYPE      SINGLE PRECISION (BI-S, DBI-D)
    C***KEYWORDS  BAIRY FUNCTION, FNLIB, SPECIAL FUNCTIONS
    C***AUTHOR  Fullerton, W., (LANL)
    C***DESCRIPTION
    C
    C BI(X) calculates the Airy function of the second kind for real
    C argument X.
    C
    C Series for BIF        on the interval -1.00000D+00 to  1.00000D+00
    C                                        with weighted error   1.88E-19
    C                                         log weighted error  18.72
    C                               significant figures required  17.74
    C                                    decimal places required  19.20
    C
    C Series for BIG        on the interval -1.00000D+00 to  1.00000D+00
    C                                        with weighted error   2.61E-17
    C                                         log weighted error  16.58
    C                               significant figures required  15.17
    C                                    decimal places required  17.03
    C
    C Series for BIF2       on the interval  1.00000D+00 to  8.00000D+00
    C                                        with weighted error   1.11E-17
    C                                         log weighted error  16.95
    C                        approx significant figures required  16.5
    C                                    decimal places required  17.45
    C
    C Series for BIG2       on the interval  1.00000D+00 to  8.00000D+00
    C                                        with weighted error   1.19E-18
    C                                         log weighted error  17.92
    C                        approx significant figures required  17.2
    C                                    decimal places required  18.42
    C
    C***REFERENCES  (NONE)
    C***ROUTINES CALLED  BIE, CSEVL, INITS, R1MACH, R9AIMP, 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   900326  Removed duplicate information from DESCRIPTION section.
    C           (WRB)
    C***END PROLOGUE  BI