如何在段落末尾添加 $\square$ 并将其右对齐，就像它是证明的结尾一样（而不是通过 \begin{proof} ！）

Question

如何在段落末尾添加 \square（或其他任何内容）并将其右对齐，就像它是证明的结尾一样（开头没有 \begin{proof}）。我不想在开头看到“证明”。

同时，我只需要进行局部/临时更改。我不想更改开头的“proof”环境。我仍然希望在其他地方正常使用 \begin{proof}

Answer 1

您只需\qed在段落末尾进行声明，这基本上是\end{proof}自动执行的操作（带有一些您不需要的花哨功能）。

\documentclass{article}
\usepackage{amsthm}

\begin{document}

A paragraph with a QED symbol at the far end. Let's go on with
nonsense words just to get a few lines. Let's go on with
nonsense words just to get a few lines. Let's go on with
nonsense words just to get a few lines.\qed

\end{document}

您可以本地更改 QED 符号。我建议为您想要的任务使用特殊命令（三角形而不是正方形）。

\documentclass{article}
\usepackage{amsthm}

\newcommand{\triangleqed}{%
  \begingroup
  \renewcommand{\qedsymbol}{\ensuremath{\triangle}}%
  \qed
  \endgroup
}

\begin{document}

A paragraph with a QED symbol at the far end. Let's go on with
nonsense words just to get a few lines. Let's go on with
nonsense words just to get a few lines. Let's go on with
nonsense words just to get a few lines.\qed

A paragraph with a QED symbol at the far end. Let's go on with
nonsense words just to get a few lines. Let's go on with
nonsense words just to get a few lines. Let's go on with
nonsense words just to get a few lines.\triangleqed

A paragraph with a QED symbol at the far end. Let's go on with
nonsense words just to get a few lines. Let's go on with
nonsense words just to get a few lines. Let's go on with
nonsense words just to get a few lines.\qed

\end{document}

Answer 2

你的意思是这样的：

\documentclass{article}

\usepackage{lipsum}
\usepackage{amssymb}

\begin{document}

  \lipsum[2]
  \unskip\nobreak\hfill $\square$

\end{document}

输出：

这显示了输出是如何产生的：