Subject: bug#21103: closed (Re: bug#21103: 24.5; LaTeX input mode: add more blackboard bold characters)

From: [email-masked] (GNU bug Tracking System)
Date: Fri, 31 Jan 2020 10:25:02 +0000

Your bug report

#21103: 24.5; LaTeX input mode: add more blackboard bold characters

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to [email-masked].

-- 
21103: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=21103
GNU Bug Tracking System
Contact [email-masked] with problems

Subject: Re: bug#21103: 24.5; LaTeX input mode: add more blackboard bold characters
From: Eli Zaretskii <[email-masked]>
To: [email-masked]
Cc: [email-masked], [email-masked], [email-masked], [email-masked]
Date: Fri, 31 Jan 2020 12:23:30 +0200
List-Id: <debbugs-submit.debbugs.gnu.org>

> Date: Tue, 21 Jan 2020 20:18:59 +0200
> From: Eli Zaretskii <[email-masked]>
> Cc: [email-masked], [email-masked], [email-masked]
> 
> > Given the above, I think this is fine to install with the
> > Copyright-paperwork-exempt tag.
> > 
> > We could perhaps contact [email-masked] if we feel unsure about this,
> > to hear what they have to say.  Does anyone think we should do that
> > first, or have any other comments?  Otherwise, I think we should just
> > install it.
> 
> Richard, are there any reasons to be more lenient with this kind of
> changes, wrt to the maximum number of lines we are allowed to accept
> without a copyright assignment?  The original patch is here:
> 
>   https://debbugs.gnu.org/cgi/bugreport.cgi?bug=21103#5
> 
> You can download the patch itself with this URL:
> 
>   https://debbugs.gnu.org/cgi/bugreport.cgi?msg=5;filename=0001-Add-more-blackboard-bold-characters.patch;att=1;bug=21103

Discussion with Richard indicated that such changes don't need any
copyright assignments, since they introduce code that is not
copyrightable.  So I've pushed this to the emacs-27 branch, and I'm
closing the bug.

Thanks.

Subject: 24.5; LaTeX input mode: add more blackboard bold characters
From: Ansgar Burchardt <[email-masked]>
To: [email-masked]
Date: Tue, 21 Jul 2015 13:28:49 +0200
List-Id: <debbugs-submit.debbugs.gnu.org>

1. Enable LaTeX input mode: C-\ "TeX" RETURN
2. Typing \Bbb{R} should now result in ℝ,
   but (for example) \Bbb{C} does not result in ℂ.

I miss at least ℂ (field of complex numbers), 𝔽 (generic field), 𝕂
(generic field, German), ℍ (quaternions), 𝕀 (identity map), ℚ (field of
rational numbers), ℤ (ring of integers). Others might miss a few more
that are in common use, see [1].

The attached patch adds all blackboard bold capital characters and "1"
and "2" using the codepoints from the referenced Wikipedia article.

Ansgar

  [1] <https://en.wikipedia.org/wiki/Blackboard_bold>

In GNU Emacs 24.5.1 (x86_64-pc-linux-gnu, GTK+ Version 3.16.4)
 of 2015-06-28 on trouble, modified by Debian
Windowing system distributor `The X.Org Foundation', version 11.0.11701000
System Description:	Debian GNU/Linux testing (stretch)

>From dbe72dfd8d230bb2d7cb17e5d573dd00b9e2d49d Mon Sep 17 00:00:00 2001
From: Ansgar Burchardt <[email-masked]>
Date: Tue, 21 Jul 2015 13:05:39 +0200
Subject: [PATCH] Add more blackboard bold characters

This patch adds all capital blackboard bold letters and those for "1"
and "2". Most characters are in common use in mathematics, but it does
not seem useful to exclude the few not widely used.

Reference: https://en.wikipedia.org/wiki/Blackboard_bold
---
 lisp/leim/quail/latin-ltx.el | 28 ++++++++++++++++++++++++++--
 1 file changed, 26 insertions(+), 2 deletions(-)

diff --git a/lisp/leim/quail/latin-ltx.el b/lisp/leim/quail/latin-ltx.el
index 82c0aa3..366f21c 100644
--- a/lisp/leim/quail/latin-ltx.el
+++ b/lisp/leim/quail/latin-ltx.el
@@ -645,10 +645,34 @@ system, including many technical ones.  Examples:
  ("\\wp" ?℘)
  ("\\wr" ?≀)
 
- ("\\Bbb{N}" ?ℕ)			; AMS commands for blackboard bold
- ("\\Bbb{P}" ?ℙ)			; Also sometimes \mathbb.
+ ("\\Bbb{A}" ?𝔸)			; AMS commands for blackboard bold
+ ("\\Bbb{B}" ?𝔹)			; Also sometimes \mathbb.
+ ("\\Bbb{C}" ?ℂ)
+ ("\\Bbb{D}" ?𝔻)
+ ("\\Bbb{E}" ?𝔼)
+ ("\\Bbb{F}" ?𝔽)
+ ("\\Bbb{G}" ?𝔾)
+ ("\\Bbb{H}" ?ℍ)
+ ("\\Bbb{I}" ?𝕀)
+ ("\\Bbb{J}" ?𝕁)
+ ("\\Bbb{K}" ?𝕂)
+ ("\\Bbb{L}" ?𝕃)
+ ("\\Bbb{M}" ?𝕄)
+ ("\\Bbb{N}" ?ℕ)
+ ("\\Bbb{O}" ?𝕆)
+ ("\\Bbb{P}" ?ℙ)
+ ("\\Bbb{Q}" ?ℚ)
  ("\\Bbb{R}" ?ℝ)
+ ("\\Bbb{S}" ?𝕊)
+ ("\\Bbb{T}" ?𝕋)
+ ("\\Bbb{U}" ?𝕌)
+ ("\\Bbb{V}" ?𝕍)
+ ("\\Bbb{W}" ?𝕎)
+ ("\\Bbb{X}" ?𝕏)
+ ("\\Bbb{Y}" ?𝕐)
  ("\\Bbb{Z}" ?ℤ)
+ ("\\Bbb{1}" ?𝟙)
+ ("\\Bbb{2}" ?𝟚)
  ("--" ?–)
  ("---" ?—)
  ;; We used to use ~ for NBSP but that's inconvenient and may even look like
-- 
2.1.4