I want to put a "~" above x, just like \hat x but replacing \hat with \sim.
How to do that?
[Tex/LaTex] How to type \sim above another symbol x
symbols
Related Solutions
\usepackage{amsmath,graphicx}
\newcommand{\widesim}[2][1.5]{
\mathrel{\overset{#2}{\scalebox{#1}[1]{$\sim$}}}
}
$A \widesim{S} B$
$A \widesim[2]{SS} B$
If the scaling is not excessive, the symbol should render well. The optional argument, that tells LaTeX how much to scale horizontally, should not be more than 2.5, otherwise some artifacts will appear. The default value is, as you requested, 1.5.
I understand, that it is like some kind of Fourier transform of the whole expression. An alternative version added.
\documentclass{article}
\usepackage{amsmath}
\usepackage{amssymb}
\begin{document}
\newcommand{\Sel}{\operatorname{Sel}}
\[
\Sel_{E}^{\Sigma_0}(\mathbb{Q}_\infty)_p{}\widehat{}
\]
But probably better
\[
(\Sel_{E}^{\Sigma_0}(\mathbb{Q}_\infty)_p)\,\widehat{}
\]
\end{document}
Best Answer
I think you're after
\tilde x.