csroot.f
SUBROUTINE CSROOT (XR, XI, YR, YI)
C***BEGIN PROLOGUE CSROOT
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Warning: this routine is not intended to be user-callable.
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C***SUBSIDIARY
C***PURPOSE Compute the complex square root of a complex number.
C***LIBRARY SLATEC
C***TYPE SINGLE PRECISION (CSROOT-S)
C***AUTHOR (UNKNOWN)
C***DESCRIPTION
C
C (YR,YI) = complex sqrt(XR,XI)
C
C***SEE ALSO EISDOC
C***ROUTINES CALLED PYTHAG
C***REVISION HISTORY (YYMMDD)
C 811101 DATE WRITTEN
C 891214 Prologue converted to Version 4.0 format. (BAB)
C 900402 Added TYPE section. (WRB)
C***END PROLOGUE CSROOT