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Re: sqrt(-1)



(1+ fixnum)  IS a fixnum in Franz. It is fairly important to our compiler
that it be.  It could be important that  sqrt returns a real for similar
reasons.  You can record my vote as saying that IF sqrt returns complex
sometimes, then there should be another say, sqrt-real.  If you want to
treat arithmetic as 2nd class, a tradition in Lisp, fine.