MAKE A MEME View Large Image Jiaxian.jpg en Yang Hui's work preserved in Yongle Encyclopedia zh-hans 永乐大典之 页， 辉引贾宪 mybook Yang Hui 1238-1298， century 13 Mathematics books book covers single pages etc Yongle Encyclopedia PD-old
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Keywords: Jiaxian.jpg en Yang Hui's work preserved in Yongle Encyclopedia zh-hans 永乐大典之 页， 辉引贾宪 mybook Yang Hui 1238-1298， century 13 Mathematics books book covers single pages etc Yongle Encyclopedia PD-old
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