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I tried to make the abstract on TexWork, but it doesn't show up when I run the program. Although I used \maketitle, \newpage. It does not work. Could you help me point out which part that is not correct on my project, please?

\documentclass[mathptmx,12pt, letterpaper,prd]{revtex4-2}
\usepackage{geometry}
\usepackage{graphicx}
\usepackage{amsmath}
\usepackage{lipsum}
\begin{document}
\title{research project}
\author{Kim Phan}
\affiliation{Department of Physics \\ Edmonds College, 20000 68th Ave. Lynnwood, WA 98036}
\maketitle
\begin{abstract}
write the abstract here
\end{abstract}
\maketitle
\begin{equation}
b^2 = c^2-a^2
\end{equation}
\end{document}

Here is the error:

! LaTeX Error: Environment abstract undefined.

See the LaTeX manual or LaTeX Companion for the explanation. Type H for immediate help. ...

l.11 \begin{abstract}

?

0 Answers0