Tcolorboxed 定理

Question

我想创建类似的东西：

这张照片的代码

\documentclass{book}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{mathtools}
\usepackage{amsthm}
\usepackage{stix}
\usepackage{tcolorbox}


% (Re)newcommands

\renewcommand\qedsymbol{$\blacksquare$}
% New counters

\newcounter{boxtheorem}[subsection]
\newenvironment{boxtheorem}[1][]{\refstepcounter{boxtheorem}\par\medskip \textbf{Theorem --- \colorbox{orange} {\theboxtheorem.} #1} \rmfamily}{\medskip}

\newtheorem{theorem}{Theorem}[subsection]

% New Theorems 

\newcommand{\tcbnamedtheoremname}{
\begin{tcolorbox}[colback=gray!40,colframe=red]{
\newtheorem{tcbnamedtheoreminner}[boxtheorem]{\protect\tcbnamedtheoremname}
\newenvironment{tcbnamedtheorem}[1]
{%
\renewcommand{\tcbnamedtheoremname}{#1}%
\begin{tcbnamedtheoreminner}%
}
{\end{tcbnamedtheoreminner}}}
\end{tcolorbox}}

% My Book

\title{Theorem Proof, Stack}

\author{Name, Surname}

\begin{document}

\maketitle
\Large
\chapter{First Chapter}

\section{Theorems}
\subsection{Colorboxed Theorems}

The \LaTeX--funcion in rows 19--26 makes this:

\begin{tcbnamedtheorem}{Cauchy--Lipschitz}
Statement.
\begin{proof}
Its Proof.
\end{proof}
\end{tcbnamedtheorem}

\flushleft{}But I'd like to have this:

\begin{tcolorbox}[colback=gray!40,colframe=red]
{\textbf{Theorem --- \colorbox{orange}{1.1.1.1.}}
Statement.}
\end{tcolorbox}
\begin{proof}
Its Proof.
\end{proof}

\end{document}

我的目标是使用 创建一种新风格的定理tcolorbox。

我不明白我创建 tex 函数哪里错了。

今天的第一篇编辑：“Overleaf”告诉我此代码有三个错误：

（1） \tcbnamedtheoremname 定义中的参数数量非法。Main Tex, 31

（2）LaTeX 错误：环境 tcbnamedtheorem 未定义。主 Tex，50

（3）LaTeX 错误：\begin{document} 以 \end{tcbnamedtheorem} 结束。Main Tex, 55

我希望通过这次编辑，我的问题会更加清楚。

Answer 1

当有一个定理标题时，你不太清楚该做什么以及你想在哪里得到证明。

这是我的例子：

\documentclass{book}
%\usepackage[utf8]{inputenc} <-- no more needed
\usepackage{amsmath}
\usepackage{mathtools}
\usepackage{amsthm}
\usepackage{stix}
\usepackage[most]{tcolorbox}

% (Re)newcommands
\renewcommand\qedsymbol{$\blacksquare$}

% New Theorems 
\newtcolorbox[auto counter, number within=subsection
    ]{tcbnamedtheorem}[2][]{%
    enhanced,
    toptitle=2mm,
    colback=gray!40,colframe=red,
    coltitle=black,
    colbacktitle=gray!40,
    detach title,before upper={\tcbtitle\ },
    title={\textbf{Theorem --- \colorbox{orange}{\thetcbcounter.}}\ifstrempty{#2}{\ignorespaces}{~#2.}}, 
    #1
    }

% My Book

\title{Theorem Proof, Stack}

\author{Name, Surname}

\begin{document}

\maketitle

\chapter{First Chapter}

\section{Theorems}
\subsection{Colorboxed Theorems}
Theorem with title and proof in the box
\begin{tcbnamedtheorem}{Cauchy--Lipschitz}
Statement.
\begin{proof}
Its Proof.
\end{proof}
\end{tcbnamedtheorem}
\noindent Theorem with title and proof out of the box
\begin{tcbnamedtheorem}{Cauchy--Lipschitz}
Statement.
\end{tcbnamedtheorem}
\begin{proof}
Its Proof.
\end{proof}
\noindent Theorem without title and proof in the box
\begin{tcbnamedtheorem}{}
Statement.
\begin{proof}
Its Proof.
\end{proof}
\end{tcbnamedtheorem}
\noindent Theorem without title and proof out of the box
\begin{tcbnamedtheorem}{}
Statement.
\end{tcbnamedtheorem}
\begin{proof}
Its Proof.
\end{proof}

\end{document}