zacai.f
SUBROUTINE ZACAI (ZR, ZI, FNU, KODE, MR, N, YR, YI, NZ, RL, TOL,
+ ELIM, ALIM)
C***BEGIN PROLOGUE ZACAI
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Warning: this routine is not intended to be user-callable.
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C***SUBSIDIARY
C***PURPOSE Subsidiary to ZAIRY
C***LIBRARY SLATEC
C***TYPE ALL (CACAI-A, ZACAI-A)
C***AUTHOR Amos, D. E., (SNL)
C***DESCRIPTION
C
C ZACAI APPLIES THE ANALYTIC CONTINUATION FORMULA
C
C K(FNU,ZN*EXP(MP))=K(FNU,ZN)*EXP(-MP*FNU) - MP*I(FNU,ZN)
C MP=PI*MR*CMPLX(0.0,1.0)
C
C TO CONTINUE THE K FUNCTION FROM THE RIGHT HALF TO THE LEFT
C HALF Z PLANE FOR USE WITH ZAIRY WHERE FNU=1/3 OR 2/3 AND N=1.
C ZACAI IS THE SAME AS ZACON WITH THE PARTS FOR LARGER ORDERS AND
C RECURRENCE REMOVED. A RECURSIVE CALL TO ZACON CAN RESULT IF ZACON
C IS CALLED FROM ZAIRY.
C
C***SEE ALSO ZAIRY
C***ROUTINES CALLED D1MACH, ZABS, ZASYI, ZBKNU, ZMLRI, ZS1S2, ZSERI
C***REVISION HISTORY (YYMMDD)
C 830501 DATE WRITTEN
C 910415 Prologue converted to Version 4.0 format. (BAB)
C***END PROLOGUE ZACAI