New on CTAN: mathbb-one
Datum: 5. November 2026 19:46:50 MEZ
Thomas Beck submitted the
mathbb-one
package.
Version: 1.0 2026-11-04
License: lppl1.3c other-free
Summary description: Blackboard-bold 1 for amssymb’s \mathbb, as a vector font
Announcement text:
mathbb-one makes \mathbb{1} work with amssymb. It prints the 1 from the bbm fonts (the closest match to amssymb's letters) as a vector font, and changes nothing else. Works with pdfLaTeX, LuaLaTeX and XeLaTeX; also defines \Bbbone and ships an OpenType version for unicode-math users.
The package’s Catalogue entry can be viewed at https://ctan.org/pkg/mathbb-one The package’s files themselves can be inspected at https://mirrors.ctan.org/fonts/cm/mathbb-one/
Thanks for the upload. For the CTAN Team Petra Rübe-Pugliese
CTAN is run entirely by volunteers and supported by TeX user groups. Please join a user group or donate to one, see https://ctan.org/lugs
mathbb-one makes \mathbb{1} work with amssymb. It prints the 1 from the bbm fonts (the closest match to amssymb's letters) as a vector font, and changes nothing else. Works with pdfLaTeX, LuaLaTeX and XeLaTeX; also defines \Bbbone and ships an OpenType version for unicode-math users.
The package’s Catalogue entry can be viewed at https://ctan.org/pkg/mathbb-one The package’s files themselves can be inspected at https://mirrors.ctan.org/fonts/cm/mathbb-one/
Thanks for the upload. For the CTAN Team Petra Rübe-Pugliese
CTAN is run entirely by volunteers and supported by TeX user groups. Please join a user group or donate to one, see https://ctan.org/lugs
Mathbb-one – Blackboard-bold 1 for amssymb’s \mathbb, as a vector font
amssymb’s \mathbb
has no digits, so \mathbb{1} (the indicator function)
prints a stray symbol.
Loading mathbb-one makes \mathbb{1} and \Bbbone
print the 1
from Gilles F. Robert’s
bbm fonts,
the closest match to the Computer Modern style of
\mathbb, shipped as Type 1 outlines instead
of METAFONT bitmaps. Nothing else changes.
Works with pdfLaTeX, LuaLaTeX and XeLaTeX;
under unicode-math
it steps aside.
An OpenType bbone.otf is included for
unicode-math users
who prefer this glyph.
| Paket | Mathbb-one |
| Version | 1.0 2026-11-04 |
| Copyright | 2026 Thomas Beck |
| Betreuer | Thomas Beck |