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Overview
Key data
| Item | Detail |
|---|---|
| Period of use | 556 – 578 CE |
| Compiler | Zhen Luan |
| Year head | Jian-yin |
Zhen Luan and the Tianhe calendar
The Tianhe calendar was made by Zhen Luan of the Northern Zhou and promulgated in the Tianhe era, used until 579 CE.
Zhen Luan was a noted mathematician of the north: he annotated the Zhoubi suanjing and the Shushu jiyi and wrote the Wucao suanjing and the Wujing suanshu. Calendar and mathematics were one field, and his mathematical grounding shows in this calendar.
Calendar and mathematics
Northern mathematics carried on the Han-Wei legacy and advanced in fractions, root extraction and interpolation. The calendar was the most important field for those methods.
Full text
No electronic full text of this work is available here. This calendar has no separate transmitted text; its methods survive scattered in the calendrical treatises of the standard histories. Among the histories held here, see Suishu, Calendrical Treatise, juan 17.
The title, date, summary and index structure compiled here are offered under CC BY 4.0 (attribution: Chujia Kuang · kuangchujia.com).
Compiled and arranged by Chujia Kuang.