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*To*: LISP-FORUM at MIT-MC*From*: Jeffrey P. Golden <JPG at MIT-MC>*Date*: Tue ,8 Dec 81 19:47:00 EDT

I do not agree with VaughanW.REFLECS that sqrt(-4) "ought" to return (2*i, -2*i) or ERROR. I think most LISP users would expect 2*i or ERROR. (Who's to say "sqrt" doesn't mean principal branch of sqrt, anyway? LISP documentation should make this clear.) After all, how many LISPs now return (2.0, -2.0) for (sqrt 4.0) ?

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