math-modesymbols
I have some problems using the exclamation mark symbol explicitly, so I have to find another way to print it on math mode. I tried to use \usepackage[utf8]{inputenc} but apparently I have to define a new macro and I really don't want to do that. Any advice would be great.
Edit: I have an application that generates a .tex file as output, the input is another file that I have to parse, and ! is as reserved symbol, so I can't put it explicitly.
Accents in math mode have to be added in a different way than in text mode; in general, an accented letter in math has no connection with the corresponding meaning in text, so ü in math is the second derivative of u, not “u with diaeresis”.
You can, if you really want to use accented letters in math, add a meaning for them.
\documentclass{article}
\usepackage{xparse}
\usepackage{fontspec}
\usepackage{polyglossia}
\setdefaultlanguage{spanish}
\ExplSyntaxOn
\NewDocumentCommand{\DeclareMathUnicode}{mm}
{
\cs_new_protected:cpn { mathutf_#1: } { #2 }
\char_set_active_eq:Nc #1 { mathutf_#1: }
\char_set_mathcode:nn { `#1 } { "8000 }
}
\cs_generate_variant:Nn \char_set_active_eq:NN { Nc }
\ExplSyntaxOff
\DeclareMathUnicode{á}{\acute{a}}
% other needed declarations
\begin{document}
Algo de texto y una fórmula $á+b=\int_{\xi}^{\theta} f(x)\,dx$.
\end{document}
It can be done -- but it shouldn't.
\documentclass{article}
\usepackage{graphicx} % for "\resizebox" macro
\newlength\mylen
\settoheight{\mylen}{$\bigg)$}
\newcommand\bigbang{\vcenter{\hbox{\resizebox{!}{1.6\mylen}{!}}}}
\begin{document}
\[
\Biggl( \biggl( \frac{p-1}{2}\biggr) \bigbang \Biggr)
\]
\end{document}
Best Answer
!is at position hex 21 so you can use^^21which will make a!token just as if a!had been in the input.