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bug#21103: 24.5; LaTeX input mode: add more blackboard bold characters
From: |
Stefan Kangas |
Subject: |
bug#21103: 24.5; LaTeX input mode: add more blackboard bold characters |
Date: |
Mon, 20 Jan 2020 21:41:30 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
Lars Ingebrigtsen <larsi@gnus.org> writes:
> Ansgar Burchardt <ansgar@43-1.org> writes:
>
>> 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.
>
> [...]
>
>> 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.
>
> It does seem more consistent to add them all, yes...
>
>> - ("\\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)
>
> (etc)
>
> A question to the other Emacs maintainers -- would a change like this,
> which is more than 15 lines, require a copyright assignment? It's not
> very "code-ey"...
I searched online, and found the following:
https://www.copyright.gov/circs/circ33.pdf
Familiar symbols and designs, or a simple combination of a few familiar
symbols or designs, are
uncopyrightable and cannot be registered with the Office. However, a work
of authorship that
incorporates one or more familiar symbols or designs into a larger design
may be registered if the
work as a whole contains a sufficient amount of creative expression.
Examples of familiar symbols and designs include but are not limited to
• Letters, punctuation, or symbols on a keyboard
• Abbreviations
• Musical notation
• Numbers and mathematical and currency symbols
• Arrows and other directional or navigational symbols
• Common symbols and shapes, such as a spade, club, heart, diamond, star,
yin yang, or
fleur de lys
• Common patterns, such as standard chevron, polka dot, checkerboard, or
houndstooth
• Well-known and commonly used symbols that contain a minimal amount of
expression or
are in the public domain, such as the peace symbol, gender symbols, or
simple emoticons
• Industry designs, such as the caduceus, barber pole, food labeling
symbols, or hazard
warning symbols
• Familiar religious symbols
• Common architecture moldings
Given the above, I think this is fine to install with the
Copyright-paperwork-exempt tag.
We could perhaps contact assign@gnu.org 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.
Best regards,
Stefan Kangas
- bug#21103: 24.5; LaTeX input mode: add more blackboard bold characters,
Stefan Kangas <=