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来自维基百科,自由的百科全书
楚衍对《九章算术》、王孝通《缉古算经》、祖冲之《缀术》、刘徽《海岛算经》等经典算经深有研究。楚衍明相法及《聿斯经》,擅长推步术、阴阳术、星历之数。因呈《宣明历》,补司天监学生,迁保章正。乾兴元年,楚衍与历官宋行古等齐集天章阁,奉诏与内侍金克隆监造新历《崇天历》,至天圣元年八月成,被授灵台郎,后晋级为司天监丞,入隶翰林天文。皇祐(1049-1053年)中,同造《司辰星漏历》十二卷。与周琮同管司天监。楚衍的门生贾宪、和朱吉,都是数学家。无子,有女亦擅长算术。
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