De Tactionibus Quae Supersunt presents the surviving fragments pertaining to the mathematical problem of 'touching' or tangent circles as addressed by Apollonius of Perga. This Latin edition makes accessible the lemmata of Pappus of Alexandria concerning these books, edited from manuscript codices for the first time. The work explores the intricacies of geometric constructions and relationships, representing a significant contribution to the field of ancient Greek geometry. This edition offers invaluable insights into the methods and thinking of classical mathematicians such as Apollonius and Pappus.

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