Typesetting unicode characters

Question

I try to use unicode characters in tex source:

\documentclass{article}
\usepackage[utf8]{inputenc}
\begin{document}
∀
\end{document}

The universal quantifier does not typeset with xelatex.

pdflatex says

! Package inputenc Error: Unicode char ∀ (U+2200)
(inputenc)                not set up for use with LaTeX.

What else should I use to typeset a universal quantifier given as a Unicode character?

LuaTeX seems to have a good support for a lot of fonts. I never play with it. — projetmbc, Apr 22 '21 at 09:36
the help text for the pdftex error does tell you the command to use to define it (as in Ulrike's answer) — David Carlisle, Apr 22 '21 at 17:53
Special case of https://tex.stackexchange.com/questions/34604/entering-unicode-characters-in-latex?r=SearchResults — user202729, Jun 02 '22 at 15:39

score 11 · Accepted Answer · answered Apr 22 '21 at 11:02

11

You need to declare it, by default pdflatex supports only a subset.

\documentclass{article}
\DeclareUnicodeCharacter{2200}{\forall}
\begin{document}
$∀$
\end{document}

answered Apr 22 '21 at 11:02

Ulrike Fischer

score 4 · Answer 2 · answered Oct 05 '21 at 19:02

For XeLaTeX and LuaLaTeX, many mathematical characters are defined in the unicode-math package

% !TeX encoding = UTF8
% !TeX program = lualatex
\documentclass{standalone}
\RequirePackage{unicode-math}
\begin{document}
$∀∃ℝ∈⟹$
\end{document}

2 Answers2