test \newgroup

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lcw 2023-11-04 13:44:58 +08:00
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commit 83377f316b

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$\newcommand{\overgroup}[1]{\overparen{#1}}$ $\renewcommand{\overgroup}[1]{\overparen{#1}}$
## 10.1 基本定义 ## 10.1 基本定义