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*To*: lisp-forum at MIT-MC*Subject*: Multiple-valued SQRT*From*: Guy.Steele at CMU-10A*Date*: Wed ,9 Dec 81 13:25:00 EDT

RMS's idea that (MULTIPLE-VALUE (X Y) (SQRT -4)) sets X and Y to 2i and -2i is interesting. There are problems with extending the idea, however. If we also agree that (SQRT X) = (EXPT X 0.5), then we have that (EXPT X 0.25) should return four values, (EXPT X 0.0625) returns sixteen, and so on. Worse yet, complex LOG has an infinite number of values. --Guy

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