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From: Jay Belanger <jay.p.belanger@gmail.com>
To: "Lennart Borgman \(gmail\)" <lennart.borgman@gmail.com>
Cc: jay.p.belanger@gmail.com, emacs-devel@gnu.org,
	Carsten Dominik <carsten.dominik@gmail.com>,
	"Randal L. Schwartz" <merlyn@stonehenge.com>
Subject: Re: bug#914: In CVS Emacs, calc-eval gives multiplication higher  precidence  than division
Date: Mon, 08 Sep 2008 17:59:38 -0500	[thread overview]
Message-ID: <87abeijlb9.fsf@gmail.com> (raw)
In-Reply-To: <48C590E2.4040804@gmail.com> (Lennart Borgman's message of "Mon,  08 Sep 2008 22:53:54 +0200")


First of all, we really need to make sure that any follow ups to any
branches of this thread are not sent to emacs bugs.

"Lennart Borgman (gmail)" <lennart.borgman@gmail.com> writes:
...
> The original bug report was about this
>
>   (calc-eval "1 / 2 * 1000")
>
> Calc treats this as 1 / (2 * 1000) which is just plain wrong.

That's overstating it.

> I have never seen a mathematician treat it that way - though I have
> seen many pupils doing that.

While there may be counterexamples, I have never seen a mathematician
write 1 / 2 * 1000 when he means (1 / 2) * 1000.  Leaving off the
paretheses may be parsable in many languages, but it's poor style in
mathematics.
The Calc shortcut under discussion has been around for 20 years and
there have already been lengthy discussions about it.  I don't know why
it's being rehashed again. 






  reply	other threads:[~2008-09-08 22:59 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-09-07 16:06 In CVS Emacs, calc-eval gives multiplication higher precidence than division Francis Litterio
2008-09-07 16:37 ` Jay Belanger
2008-09-07 18:15   ` Francis Litterio
2008-09-07 19:46   ` Stefan Monnier
2008-09-07 20:19     ` bug#920: " Lennart Borgman (gmail)
2008-09-07 20:32     ` Randal L. Schwartz
2008-09-07 20:34       ` Lennart Borgman (gmail)
2008-09-07 20:38         ` Randal L. Schwartz
2008-09-07 20:42           ` Lennart Borgman (gmail)
2008-09-07 20:50             ` Randal L. Schwartz
2008-09-07 21:07               ` Lennart Borgman (gmail)
2008-09-08  6:39                 ` Ulrich Mueller
2008-09-08  7:07                   ` Lennart Borgman (gmail)
2008-09-07 21:10               ` Stefan Monnier
2008-09-07 23:30                 ` Jay Belanger
2008-09-08  0:50               ` Jason Rumney
2008-09-08  1:13             ` Randal L. Schwartz
2008-09-08  3:47               ` Stefan Monnier
2008-09-08  8:48                 ` Miles Bader
2008-09-08 12:59                   ` Stefan Monnier
2008-09-08 13:29                   ` martin rudalics
2008-09-08  7:26               ` Lennart Borgman (gmail)
2008-09-07 21:10           ` Stefan Monnier
2008-09-08 10:30       ` Carsten Dominik
2008-09-08 11:01         ` Lennart Borgman
2008-09-08 20:33           ` Carsten Dominik
2008-09-08 20:39             ` Lennart Borgman (gmail)
2008-09-08 20:43               ` Randal L. Schwartz
2008-09-08 20:53                 ` Lennart Borgman (gmail)
2008-09-08 22:59                   ` Jay Belanger [this message]
2008-09-08 23:44                     ` bug#914: " Lennart Borgman (gmail)
2008-09-09 13:28                     ` Stefan Monnier
2008-09-09 14:36                       ` Francis Litterio
2008-09-09 16:26                         ` Ulrich Mueller
2008-09-09 16:41                           ` Lennart Borgman (gmail)
2008-09-30  4:10                         ` Leo
2008-09-08 20:53                 ` Lennart Borgman (gmail)
2008-09-08 21:42                 ` Stefan Monnier
2008-09-09  8:11                 ` Richard M. Stallman
2008-09-09 13:26                   ` Stefan Monnier
2008-09-09 17:03                     ` Lennart Borgman (gmail)
2008-09-09 17:19                       ` Stefan Monnier
2008-09-08 13:01         ` Stefan Monnier
2008-09-07 20:35     ` Jay Belanger
2008-09-07 21:15       ` Stefan Monnier
2008-09-07 21:19         ` Lennart Borgman (gmail)

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