Categoriarum supplementa. Pophyrii Isagoge translatio Boethii et Anonymi fragmentum vulgo vocatum 'Liber sex principiorum'

This volume constitutes a supplement to the Latin versions of the Categories. It contains Porphyry's famous Introduction to Aristotle's Categories in Boethius' translation (6) and an extract of an anonymous twelfth-century Latin writing, which was widespread under the title Liber sex principiorum (7). It deals mainly with the last six categories, treated more briefly in Aristotle's work. The volume also contains the fragments quoted by Boethius from an older Latin version of Porphyry's Introduction, made by Marius Victorinus.