定理环境

清平乐·六盘山_百度汉语
作者：* * *
天高云淡，
望断南飞雁。
不到长城非好汉，
屈指行程二万。
六盘山上高峰，
红旗漫卷西风。
今日长缨在手，
何时缚住苍龙？

书愤五首·其一
宋 · 陆游
早岁那知世事艰，中原北望气如山。楼船夜雪瓜洲渡，铁马秋风大散关。塞上长城空自许，镜中衰鬓已先斑。出师一表真名世，千载谁堪伯仲间。

\documentclass[UTF8]{ctexart}
\usepackage{enumitem}
\usepackage{tcolorbox}
\tcbuselibrary{many}
%\tcbuselibrary{skins, breakable, theorems}

\usepackage{amsmath, amssymb}

\newtcbtheorem{question}{题~(理}%
{enhanced, breakable,
colback = white, colframe = cyan, colbacktitle = cyan,
attach boxed title to top left = {yshift = -2mm, xshift = 5mm},
boxed title style = {sharp corners},
fonttitle = \sffamily\bfseries, separator sign = {).~}}{qst}

\begin{document}
\section{测试}

\begin{question}{函数}{example}
已知函数 $ f(x) = (x - 2)\mathrm{e}^{2} + a (x - 1)^{2} $ 有两个零点.
\begin{enumerate}[label=(\arabic*)]
\item 求 $ a $ 的取值范围;
\item 设 $ x_{1} $, $ x_{2} $ 是 $ f(x) $ 的两个零点，证明 $ x_{1} + x_{2} < 2 $.
\end{enumerate}
\end{question}

\section{标题}
\newtcbtheorem[number within=section]{mytheo}{定理}%
{colback=green!5,colframe=green!35!black,fonttitle=\bfseries}{th}
\begin{mytheo}{我的定理}{}
这是默认样式。
\end{mytheo}
\begin{mytheo}[separator sign = {\ $\blacktriangleright$}]{我的定理}{}
分隔符修改为 $\blacktriangleright$。
\end{mytheo}
\begin{mytheo}[description delimiters parenthesis]{我的定理}{}
定界符修改为圆括号。
\end{mytheo}
\begin{mytheo}[description color=red!25!yellow,
description font= {\mdseries\itshape}]{我的定理}{}
标题的字体及颜色修改。
\end{mytheo}
\begin{mytheo}[terminator sign={.}]{我的定理}{}
标题后的终止符。
\end{mytheo}

\tcbset{boxrule = 0.5mm, colback=red!5!white, colframe=red!75!black,
title = {My title}}
\begin{tcolorbox}
This is a \textbf{tcolorbox}.
\end{tcolorbox}
\begin{tcolorbox}[toprule = 3mm]
This is a \textbf{tcolorbox}.
\end{tcolorbox}
\begin{tcolorbox}[bottomrule = 3mm]
This is a \textbf{tcolorbox}.
\end{tcolorbox}
\begin{tcolorbox}[leftrule = 3mm]
This is a \textbf{tcolorbox}.
\end{tcolorbox}
\begin{tcolorbox}[rightrule = 3mm]
This is a \textbf{tcolorbox}.
\end{tcolorbox}
\begin{tcolorbox}[titlerule = 3mm]
This is a \textbf{tcolorbox}.
\end{tcolorbox}

\tcbset{colback = red!5!white, colframe = red!75!black}
\begin{tcolorbox}[arc = 0mm]
This is a \textbf{tcolorbox}.
\end{tcolorbox}
\begin{tcolorbox}[arc = 3mm]
This is a \textbf{tcolorbox}.
\end{tcolorbox}
\begin{tcolorbox}[arc = 4mm, outer arc = 1mm]
This is a \textbf{tcolorbox}.
\end{tcolorbox}
\begin{tcolorbox}[arc = 1mm, outer arc = 4mm]
This is a \textbf{tcolorbox}.
\end{tcolorbox}

\end{document}

 

\documentclass{article}
\usepackage{tcolorbox}
\tcbuselibrary{most}
\begin{document}
\tcbset{colback = red!5!white, colframe = red!75!black}
\begin{tcolorbox}[arc = 0mm]
This is a \textbf{tcolorbox}.
\end{tcolorbox}
\begin{tcolorbox}[arc = 3mm]
This is a \textbf{tcolorbox}.
\end{tcolorbox}
\begin{tcolorbox}[arc = 4mm, outer arc = 1mm]
This is a \textbf{tcolorbox}.
\end{tcolorbox}
\begin{tcolorbox}[arc = 1mm, outer arc = 4mm]
This is a \textbf{tcolorbox}.
\end{tcolorbox}
\end{document}

 

 

%%https://liam.page/categories/LaTeX/