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[no subject]

the atan function on the vax returns a value in the range -pi to pi,
given the 2 arg form.  on the pdp-10 it seems to be 0 to 2*pi.  This
causes some problems.  Who is right?  Note that macsyma CHANGES the
value returned from lisp at mit to what it is on 
  when macsyma runs on the vax, it overcompensates..