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A compilation of computistical and astronomical material, which survives in a number of recensions produced between the 8th/9th and 12th centuries.
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Short computistical treatise on the bissextus, formerly attributed to Alcuin but now considered to be an anonymous work. In the manuscripts, it is closely associated with another short tract known as De saltu lunae. It consists of two parts, usually headed De bissexto and Aliud argumentum de bissexto.
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Computistical treatise formerly attributed to Alcuin but now considered to be an anonymous work. In the manuscripts it is usually found together with De bissexto.
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Short, influential and widely disseminated Latin tract on the topic of time-reckoning, written c.703 by the Northumbrian monk Bede. Bede came to revisit this topic at greater length when in c.725 he wrote De tempore rationum.
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Extensive Frankish collection of computistical and astronomical matter that arose from a meeting of clerical scholars at Aachen in 809 and further work possibly supervised by Adalhard of Corbie. It was completed by 810 or 812. The work is arranged in seven books.
Extensive Frankish collection of computistical and astronomical matter, which builds on the Seven-book computus of 809-812, was created under the supervision of bishop Arno of Salzburg and was completed in 818.