Liber Almagesti Ptholomei abbreviatus
‘(Utrecht, UB, 6.A.3) Incipit liber Almagesti Ptholomei abbreviatus. Prefatio sex continens conclusiones. Omnium recte phylozophantium non solum verissimilibus et credibilibus argumentis — de duobus reliquis triangulis orthogoniis duarum.’
A commentary on the Almagesti minor consisting of ‘a mixture of excerpts, summaries, and commentary’ (Zepeda, 118). The text appears to be incomplete or unfinished in the only known MS.
This commentary was composed after c. 1462, since the author used Regiomontanus’s Epitome Almagesti, and may have originated with the scribe/author of the only known MS c. 1500. An alternative title of the work is given to Book III: ‘Incipit liber tertius epythomatis super astronomia Albategni’.
H. Zepeda, The First Latin Treatise on Ptolemy’s Astronomy: The Almagesti minor (c. 1200), Turnhout, 2018, 117-119.