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緝古算經
目錄
緝古算經
Source: CHANT
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Edition:
master
Catalog category:
天文算法類
Dates:
(Category not assigned)
9999
Textlength:
8892 characters.
Comment:
Wikidata:
WD
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緝古算經
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緝古算經
[一]假令天正十一月朔、夜半,
日在斗十度、七百分度之四
百八十。
以章歲爲母,
朔月行定分九千,
朔日定小餘一
萬,
日法二萬,
章歲七百,
亦名行分法。
今不取加時日度。
問天正朔夜半之時,
月在何處?
推朔夜半月度,
舊術要須加時日度。
自古先儒雖復
修撰改制,
意見甚衆,
竝未得算妙,
有理不盡,
考校尤難。
臣毎日夜思量,
常以此理屈滯,
恐後代無人知者。
今奉
勅造曆,
因卽改制,
爲此新術。
舊推日度之術,
已得朔夜半日度,
仍須更求加時日度,
然知月處。
臣今作新術,
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