LaTeX Forum

\documentclass{scrartcl}
\usepackage[ngerman]{babel}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{amsthm}

\newtheoremstyle{theorstyle}      %Style defnieren
{0mm}
{0mm}
{}
{}
{\bfseries}
{\normalfont :}
{ }
{}
 
\theoremstyle{theorstyle}

\newtheorem{def1}{\large Definition}[section]
\newtheorem{sat1}{\large Satz}[section]
\newtheorem*{kor1}{\large Korollar}%[section]
\newtheorem{lem1}{\large Lemma}[section]
\newcommand{\defgl}{\mathrel{\mathop:}=}
\newtheorem{the1}{\large Theorem}[section]
\usepackage{framed}
\usepackage{xcolor}
\usepackage{mdframed}
\definecolor{shadecolor}{RGB}{224,224,224}

\begin{document}

\begin{shaded*}
\begin{the1}
~\\ 
Seien $X_1,X_2,\dots$ u.i.v exp(1). Dann gilt:
\begin{align*}
(X_{U_0},X_{U_1},\dots,X_{U_n}) \stackrel{d}{=} (Z_1,Z_1 + Z_2,\dots,Z_1 + \dots + Z_n)
\end{align*}
wobei die $Z_1,Z_2,\dots$ u.i.v. exp$(1)$ sind.
\end{the1}
\end{shaded*}

\end{document}

\documentclass{scrartcl}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage[ngerman]{babel}
\usepackage{amsthm}
\usepackage{tcolorbox}

\tcbuselibrary{theorems}

\newtcbtheorem[number within=section]{mytheorem}{Theorem}{
	theorem style=break,
	sharp corners,
	terminator sign colon,
	colframe=lightgray!20,
	colback=lightgray!20,
	coltitle=black,
	fonttitle=\bfseries\upshape,
	fontupper=\itshape
}{thm}


\begin{document}

\section{Abschnitt}

\begin{mytheorem}{}{}
Seien $X_1,X_2,\dots$ u.i.v $e$. Dann gilt:
\begin{align*}
(X_{U_0},X_{U_1},\dots,X_{U_n}) \stackrel{d}{=} (Z_1,Z_1 + Z_2, \dots ,Z_1 + \dots + Z_n)
\end{align*}
wobei die $Z_1,Z_2,\dots$ u.i.v. $e$ sind.
\end{mytheorem}

\end{document}

%\begin{Styles für Sätze} 

\newtheoremstyle{theorstyle}		%Style defnieren
{0mm}
{0mm}
{}
{}
{\bfseries}
{\normalfont :}
{ }
{}
 
\theoremstyle{theorstyle}



\newtheorem{def1}{\large{Definition}}[section]
\newtheorem{sat1}{\large{Satz}}[section]
\newtheorem*{kor1}{\large{Korollar}}%[section]
\newtheorem{lem1}{\large{Lemma}}[section]
\newcommand{\defgl}{\mathrel{\mathop:}=}
\newtheorem{the1}{\large{Theorem}}[section]
\usepackage{framed}
%\usepackage{prettyref}
\usepackage{xcolor}
\usepackage{mdframed}
\definecolor{shadecolor}{RGB}{224,224,224}

%\end{Styles für Sätze}

\begin{document}
%minimalbeispiel:

\begin{shaded*}
\begin{the1}
~\\ 
Seien $X_1,X_2,\dots$ u.i.v exp(1). Dann gilt:
\begin{align*}
(X_{U_0},X_{U_1},\dots,X_{U_n}) \stackrel{d}{=} (Z_1,Z_1 + Z_2, \dots ,Z_1 + \dots + Z_n)
\end{align*}
wobei die $Z_1,Z_2,\dots$ u.i.v. exp$(1)$ sind.
\end{the1}
\end{shaded*}

\end{document}