Bunte Kasten um Definitionen Sätze etc. machen

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{mathtools,amssymb,lipsum}
\usepackage[theorems]{tcolorbox}
% Shorthands
\newcommand*\iffdef{\overset{\text{def}}{\iff}}
\DeclarePairedDelimiter\abs{\lvert}{\rvert}
\DeclarePairedDelimiter\norm{\lVert}{\rVert}
%Theorem
\tcbset{
  defstyle/.style={
    fonttitle=\sffamily\bfseries,
    arc=0mm,
    colback=white,
    colframe=red,
    separator sign none
  }
}
\newtcbtheorem[number within=subsection]{Def}{Definition}{defstyle}{def}
\begin{document}
\setcounter{section}{2}
\setcounter{subsection}{4}
Verweis auf die Definition \ref{def:beispieldef} und weiterer Text: \lipsum[66]
\begin{Def}{}{beispieldef}
  % 2.Argument: Titel der Definition (hier leer),
  % 3.Argument für Labeldefinition (hier Verweis mit \ref{def:beispieldef} möglich)
  Eine Teilmenge $\tilde{G}\subset C(\tilde{I},\mathbb{R}^n)$, wobei
  $\tilde{I} \subset \mathbb{B}$ abgeschlossen und beschränkt ist, ist
  \emph{gleichgeradig stetig} $\iffdef$
  \begin{equation*}
    \forall_{\varepsilon > 0}\;
    \exists_{\delta_\varepsilon > 0}\;
    \forall_{\substack{t',t'' \in \tilde{I}\\ \hidewidth\abs{t'-t''} < \delta_\varepsilon\hidewidth}}
    \quad{\color{red}\forall_{f\in\tilde{G}}}\;
    \norm{f(t') - f(t'')}_{\mathbb{R}^n} < \varepsilon
  \end{equation*}
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX