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- To: HEDRICK at RUTGERS, dlw at MIT-AI
- Subject: Re: x^0.0
- From: JONL at PARC-MAXC
- Date: Thu, 02 Dec 1982 08:06:00 -0000
- Cc: Kim.fateman at UCB-C70, common-lisp at SU-AI, JONL
In response to the message sent 1 Dec 1982 1810-EST from HEDRICK@RUTGERS
I'm not sure that you really do have *two* choices; INF has to
have certain properties, such as being larger in magnitude than
any other (non-INF) number, and being an additive sink. Similarly,
UNDEFINED has to be an operative sink; trying to make an exception
for zero seems to lead to another of those discontinuities like
0^0 = 0.
But I certainly agree that a user-settable option calling for an
error upon generation of UNDEFINED would be a good idea.