From: "Fraga, Eric" <e.fraga@ucl.ac.uk>
To: Justus Winter <justus@sequoia-pgp.org>
Cc: "emacs-orgmode@gnu.org" <emacs-orgmode@gnu.org>
Subject: Re: Bug: Operator associativity problem [9.1.9 (release_9.1.9-65-g5e4542 @ /usr/share/emacs/26.1/lisp/org/)]
Date: Thu, 26 Sep 2019 05:23:37 +0000 [thread overview]
Message-ID: <87h84zmy08.fsf@ucl.ac.uk> (raw)
In-Reply-To: <874l10nsw5.fsf@thinkbox.jade-hamburg.de> (Justus Winter's message of "Wed, 25 Sep 2019 20:16:26 +0200")
On Wednesday, 25 Sep 2019 at 20:16, Justus Winter wrote:
> However, I cannot fathom the rationale behind this property, and for a
> spreadsheet-like application I consider it borderline negligent.
Not my place to defend (or otherwise) the decisions that went into defining the grammar for Calc. However, there is no single universal precedence definition for algebraic expressions. People do write, e.g. in heat transfer applications, W/m^2 K to mean W/(m^2 K) which is not the precedence you believe should be implemented. Just because Excel, say, implements something does not make it negligent for others to implement something different.
As a mathematician, I always write my expressions as, for instance, W m^{-2} K^{-1} both in practice and when teaching to avoid all doubt.
--
Eric S Fraga via Emacs 27.0.50, Org release_9.2.4-401-gfabd6d
next prev parent reply other threads:[~2019-09-26 5:23 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-25 9:50 Bug: Operator associativity problem [9.1.9 (release_9.1.9-65-g5e4542 @ /usr/share/emacs/26.1/lisp/org/)] Justus Winter
2019-09-25 12:51 ` Fraga, Eric
2019-09-25 18:16 ` Justus Winter
2019-09-26 5:23 ` Fraga, Eric [this message]
2019-09-26 9:23 ` Robert Pluim
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87h84zmy08.fsf@ucl.ac.uk \
--to=e.fraga@ucl.ac.uk \
--cc=emacs-orgmode@gnu.org \
--cc=justus@sequoia-pgp.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.