*DECK DF0S DOUBLE PRECISION FUNCTION DF0S (X) C***BEGIN PROLOGUE DF0S C***PURPOSE Subsidiary to C***LIBRARY SLATEC C***AUTHOR (UNKNOWN) C***ROUTINES CALLED (NONE) C***REVISION HISTORY (YYMMDD) C ?????? DATE WRITTEN C 891214 Prologue converted to Version 4.0 format. (BAB) C***END PROLOGUE DF0S DOUBLE PRECISION X C***FIRST EXECUTABLE STATEMENT DF0S DF0S = 0.0D+00 IF(X.NE.0.0D+00) DF0S = 0.1D+01/SQRT(X) RETURN END