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From: bchen@eeyore.caltech.edu (Bing-Qing Chen)
Newsgroups: comp.sys.next
Subject: Re: NeXT Mathematica Bug
Message-ID: <1991Mar3.070201.14874@nntp-server.caltech.edu>
Date: 3 Mar 91 07:02:01 GMT
References: <1991Mar3.053006.2986@math.ucla.edu>
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Organization: California Institute of Technology, Pasadena
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In article <1991Mar3.053006.2986@math.ucla.edu> barry@pico.math.ucla.edu (Barry Merriman) writes:
>
>The bug: Tanh[x] is not computed correctly. To _see_ if you have
>it, do
>
>Plot[Tanh[x],{x,-3,3}]
>
>and see if there is an obvious discontinuity in the graph. Or,
>do
>
>Tanh[-1.8]
>
>and see if you get a number < -1 (note Range of tanh is (-1,1)).
>
It seems that only Mathematica on 040 NeXT failed to compute Tanh[-1.8] 
correctly. Mathematica on 030 NeXT gives the correct result. I have run
into such problems before. I believe it is because Mathematica was compiled
under 1.0.

- Bing Chen
bchen@pooh.caltech.edu