How can I improve brakets in this equation please?
\begin{equation}\label{E}
E_0^{(1)} = \expval{\frac{e'^2}{|\vec{r_1}-\vec{r_2}|}}{\Phi}
\end{equation}
EDIT: And please, what is wrong here? I think that in the end should be {\Phi }\, but it is mistake by compilation.
\documentclass{article}
\usepackage{physics}
\begin{document}
\begin{equation}\label{E}
E_0^{(1)} = 4 \pi e'^2 \expval**{\frac{1}{|\vec{r}_2|} \sum\limits_{l=0}^{\infty} \sum\limits_{m=-l}^l \left(\frac{|\vec{x}^{(1)}|}{|\vec{x}^{(2)}|} \right)^l \Phi }\\
\end{equation}
\end{document}
\left...\right
? P.S. I usually write\vec{r}_1
because of space. – manooooh Nov 9 '18 at 19:36\expval
command come from? – Phelype Oleinik Nov 9 '18 at 19:37\vec{r}_1
instead of\vec{r_1}
, and\vec{r}_2
instead of\vec{r_2}
. – Mico Nov 9 '18 at 20:04