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 <title>五、方尖碑上的毕达哥拉斯</title>
 <link>http://gezhi.org/node/672</link>
 <description>&lt;p&gt;这个涉及到太多的符号和图形，给出原文链接算了。&lt;/p&gt;
&lt;p&gt;&lt;a href=&quot;http://ipang.net/maths/5&quot;&gt;http://ipang.net/maths/5&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;BTW：我的网志剔思集换到drupal平台下了。&lt;/p&gt;
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 <category domain="http://gezhi.org/taxonomy/term/609">勾股定理</category>
 <category domain="http://gezhi.org/taxonomy/term/435">数学史</category>
 <pubDate>Fri, 13 Jul 2007 23:10:19 -0700</pubDate>
 <dc:creator>ipang</dc:creator>
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