How to reproduce this symbol, using Latex, that consists of a long vertical bar, on the right hand side of an expression, and some small text at the bottom, that defines some condition?
How to reproduce this symbol using latex?
2 Answers
The basic building bloc is \vert. Because it is extensible, you have various ways to make it grow.
The various forms of \[B/b]ig[g] grow it a defined amount, whereas the use as part of a \left...\right context grows it to fit the content.
\documentclass{article}
\begin{document}
\[
A\vert_x
\]
\[
\frac{A}{B}\bigr\vert_x
\frac{A}{B}\Bigr\vert_x
\frac{A}{B}\biggr\vert_x
\frac{A}{B}\Biggr\vert_x
\]
\[
\left.\frac{\displaystyle\frac{A}{B}}{\displaystyle1 + \frac{C}{D}}\right\vert_x
\]
\end{document}
answered Sep 29, 2017 at 19:15
-
Interesting—I've always used
\Big|_{x}. Should I prevert to substitute\vertfor|?– wcharginSep 29, 2017 at 21:29 -
@wchargin In general
|and\vertare completely equivalent. Indeed,\vertis defined as\delimiter "026A30Cand the\delcodeof|is26A30C, while its\mathcodeis026A.– egregSep 29, 2017 at 22:37
Just for training
\documentclass{article}
\usepackage{amsmath,amssymb}
\begin{document}
\[
+\Delta\mu_{i}\left.\frac{\partial E_{S\sim\mathcal{N}(\mu,\sigma^{2}_{S})}[f(S)]}{\partial \mu}\right\vert_{\mu=\mu_{S}}
\]
\end{document}
answered Sep 29, 2017 at 19:17
\vertand it is extensible, as in\left. \frac{...}{...}\right\vert_{...}