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Groups > comp.lang.java.programmer > #35847
| From | Eric Sosman <esosman@comcast-dot-net.invalid> |
|---|---|
| Newsgroups | comp.lang.java.programmer |
| Subject | Re: Fwd: Re: double == double |
| Date | 2016-10-20 07:54 -0400 |
| Organization | A noiseless patient Spider |
| Message-ID | <nuab8i$s04$1@dont-email.me> (permalink) |
| References | <md5:/ly77XHCxjkwLJNg81+qIg==> <nu8nek$mbu$2@dont-email.me> <nu96n0$eqr$1@gioia.aioe.org> |
On 10/19/2016 9:30 PM, Arne Vajhøj wrote:
> On 10/19/2016 5:10 PM, Eric Sosman wrote:
>> (A final point: All this argument over the sign of nothing leaves
>> me, I confess, a bit perplexed. However, those with more numerical
>> sophistication find the distinction between +0 and -0 to be of great
>> practical importance. William Kahan is particularly vehement on the
>> topic; look for his presentation titled "Branch Cuts for Complex
>> Elementary Functions or Much Ado About Nothing's Sign Bit," and
>> bring more mathematical prowess to your reading than I can. :)
>
> With the specification for operations then I don't think the
> existence of -0.0 has much impact on practical programming.
Kahan ("the primary architect behind the IEEE 754-1985 standard
for floating-point computation" -- Wikipedia) disagrees. Since he
knows a whale of a lot more about numerical computation than I ever
will, I'm inclined to take his word for it.
(He's no fan of Java, by the way. Look for his presentation
"How JAVA's Floating-Point Hurts Everyone Everywhere." It starts
out rather calmly but develops into what sounds like a rant -- but
by that time its mathematics is so far above me that rantingness
may just be a figment of my lack of imagination.)
--
esosman@comcast-dot-net.invalid
"Don't be afraid of work. Make work afraid of you." -- TLM
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Fwd: Re: double == double Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-10-19 17:10 -0400
Re: Fwd: Re: double == double Arne Vajhøj <arne@vajhoej.dk> - 2016-10-19 21:30 -0400
Re: Fwd: Re: double == double Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-10-20 07:54 -0400
Re: Fwd: Re: double == double Michael Jung <miju@golem.phantasia.org> - 2016-10-20 20:59 +0200
Re: Fwd: Re: double == double Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-10-20 15:37 -0400
Re: Fwd: Re: double == double Michael Jung <miju@golem.phantasia.org> - 2016-10-21 19:53 +0200
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