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  <author_name>rom_k</author_name>
  <author_url>https://blog.hatena.ne.jp/rom_k/</author_url>
  <blog_title>coding@ease</blog_title>
  <blog_url>https://rom-k.hatenadiary.org/</blog_url>
  <categories>
    <anon>tex</anon>
  </categories>
  <description>texでTがひっくり返ったような記号（これ→）を出すために．graphicxをusepackageしといて，\rotatebox[origin=c]{180}{T}とすると出る．ただし面倒いのでマクロ作成 \newcommand{\contradiction}[0]{\rotatebox[origin=c]{180}{T}} これで，\contradictionとすれば出る． cf. LaTeX GRAPHICS編(basic)</description>
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  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2006-02-21 00:00:00</published>
  <title>矛盾記号</title>
  <type>rich</type>
  <url>https://rom-k.hatenadiary.org/entry/20060221/p1</url>
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