2
\documentclass [10pt,a4paper]{report}
\usepackage [utf8]{inputenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{graphicx}
\usepackage[left=2cm,right=2cm,top=2cm,bottom=2cm]{geometry}
\begin{document}

\begin{Abstract}
text here
\end{Abstract}

\end{document}
2
  • 13
    You might be looking for the abstract environment, no cap.
    – Édouard
    Commented Jul 7, 2013 at 10:18
  • Explaining what @Édouard pointed out: just about everything in LaTeX is case-sensitive; since \begin{Env} and \end{Env} basically resolve to \Env and \endEnv, the importance of case becomes evident. Commented Jul 7, 2013 at 12:31

2 Answers 2

4

I believe the environment you’re looking for is abstract.

\documentclass [10pt,a4paper]{report}
\usepackage [utf8]{inputenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{graphicx}
\usepackage[left=2cm,right=2cm,top=2cm,bottom=2cm]{geometry}
\begin{document}

\begin{abstract}
text here
\end{abstract}

\end{document}

As Sean Allred explained in his comment, TeX (thus LaTeX) is case-sensitive. This means that abstract and Abstract designate two different environments, and the latter is undefined.

The document proves that LaTeX is case-sensitive:

\documentclass{article}

\newcommand\mymacro{\LaTeX{} is case-sensitive.}
% Actually, if LaTeX was not case-sensitive, the next line would create an error
% (\newcommand would fail if \MYMACRO were already defined)
\newcommand\MYMACRO{\LaTeX{} is \textit{not} case-sensitive.}

\begin{document}

\mymacro

\end{document}
0
0
\documentclass [10pt,a4paper]{report}
\usepackage [utf8]{inputenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{graphicx}
\usepackage[left=2cm,right=2cm,top=2cm,bottom=2cm]{geometry}

\newenvironment{Abstract}
{\begin{abstract}}
{\end{abstract}}

\begin{document}

\begin{Abstract}
text here
\end{Abstract}

\end{document}

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