Abstract

This is the first edition to provide the complete text of both the fifth-century Calculus of Victorius of Aquitaine and Abbo of Fleury's Commentary on it. These two works shed light on the early history of mathematics, before the introduction of Arabic numerals. The wide range of Abbo's thought is reflected in the Commentary, covering the nature of wisdom, the philosophy of number, the relationship of unity and plurality, and the arithmetic of the Calculus - all of it set in the broader context of his theology of Creation. This edition is crucial for our current reappraisal of Abbo of Fleury as a major figure of the tenth century, who had a profound impact on later medieval English thought.