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Zhu Shijie
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Sixianghuiyuan, Chinese mathematics
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Sixianghuiyuan, Jade Mirror of  Four  Unknowns, Facsimile of Zhu Shijie's Jade Mirror of Four Unknowns, Equations of four Elements, facsimile of Zhu Shijie: Jade Mirror of Four Unknowns
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朱世傑の『四元玉鑑』の写し。
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A copy of "Shigengyokukan" by Zhu Shijie.
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四香会元
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四香会元、鏡 四名 朱世傑玉鏡 四名 四元素式 朱世傑の影鏡
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