![我如何创建一个环境或几个可以控制段落编号的环境?](https://linux22.com/image/412312/%E6%88%91%E5%A6%82%E4%BD%95%E5%88%9B%E5%BB%BA%E4%B8%80%E4%B8%AA%E7%8E%AF%E5%A2%83%E6%88%96%E5%87%A0%E4%B8%AA%E5%8F%AF%E4%BB%A5%E6%8E%A7%E5%88%B6%E6%AE%B5%E8%90%BD%E7%BC%96%E5%8F%B7%E7%9A%84%E7%8E%AF%E5%A2%83%EF%BC%9F.png)
在 LaTeX 中,如何编写段落,其中有些段落有编号,有些没有?例如
1.1 \textit{repeat} Lorem ipsum.
1.2 \textit{Inner product spaces} Lorem ipsum.
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1.3 \textit{Examples} Lorem ipsum.
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1.4 \textbf{Scharz's inequality} Lorem ipsum.
\textit{Proof}. Lorem ipsum
1.5. \textbf{Theorem} Lorem ipsum
\textit{Proof} Lorem ipsum
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1.6 \textit{Norm space} From previous theorem, one can define \textit{norm spaces} as ...