zlog.f
SUBROUTINE ZLOG (AR, AI, BR, BI, IERR)
C***BEGIN PROLOGUE ZLOG
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Warning: this routine is not intended to be user-callable.
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C***SUBSIDIARY
C***PURPOSE Subsidiary to ZBESH, ZBESI, ZBESJ, ZBESK, ZBESY, ZAIRY and
C ZBIRY
C***LIBRARY SLATEC
C***TYPE ALL (ZLOG-A)
C***AUTHOR Amos, D. E., (SNL)
C***DESCRIPTION
C
C DOUBLE PRECISION COMPLEX LOGARITHM B=CLOG(A)
C IERR=0,NORMAL RETURN IERR=1, Z=CMPLX(0.0,0.0)
C***SEE ALSO ZAIRY, ZBESH, ZBESI, ZBESJ, ZBESK, ZBESY, ZBIRY
C***ROUTINES CALLED ZABS
C***REVISION HISTORY (YYMMDD)
C 830501 DATE WRITTEN
C 910415 Prologue converted to Version 4.0 format. (BAB)
C***END PROLOGUE ZLOG