The geometry in codex 80 (XII) of the cathedral of Tortosa

Identifier:  PC:2016

Handle: https://hdl.handle.net/20.500.11797/PC2016

Authors:  Lluís i Ginovart, Josep; Baiges i Jardí, Ignasi; Alanyà i Roig, Josep

Abstract:
The geometry in codex 80 of the Capitular Archive has traditionally been understood as a complete text and attributed to Gerbert of Aurillac (c. 940-1003). From a new reading of the text, we can say that it is a miscellaneous writing about geometry, composed of three independent parts: one containing the Geometria Incerti Auctoris apocryphical by Gerbert of Aurillac (c. 940-1003); another one is a fragment of De Nuptiis Philologiae et Mercurii by Martianus Capella (fl . 430) from Ergasticis Schematibus of Book VII of the Geometry; and fi nally there is a gloss to the Elementa by Euclides (c. 325-c. 265 bC.) by Al-¿ajj¿j ibn Y¿suf ibn Ma¿ar (786-833). The interpretation of the geometrical propositions provides knowledge about the indirect measure of places which are inaccessible using medieval instrumental, the astrolabe, mirrors, cane and squares.