$\newcommand{\R}{\mathbb{R}}$ $\newcommand{\C}{\mathbb{C}}$ $\newcommand{\rank}{\operatorname{rank}}$ $\newcommand{\N}{\mathbb{N}}$ $\newcommand{\Z}{\mathbb{Z}}$ $\newcommand{\K}{\mathbb{K}}$ $\newcommand{\Ha}{\mathbb{H}}$ $\newcommand{\act}{\curvearrowright}$ $\newcommand{\mfp}{\frak{p}}$ $\newcommand{\Herm}{\operatorname{Herm}}$ $\newcommand{\Alt}{\operatorname{Alt}}$ $\newcommand{\Sym}{\operatorname{Sym}}$ $\newcommand{\trace}{\operatorname{trace}}$ $\newcommand{\Ad}{\operatorname{Ad}}$ $\newcommand{\ad}{\operatorname{ad}}$ $\newcommand{\diag}{\operatorname{diag}}$ $\newcommand{\Pf}{\operatorname{Pf}}$ $\newcommand{\Lie}{\operatorname{Lie}}$ $\renewcommand{\labelenumi}{(\roman{enumi})}$

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git，githubの練習もかねて何かしら書きます．テーマは以下を使っています．
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