The astrology of mathematicians. Mathematics applied to astrology throughout the works of Ibn Mu'ādh al-Jayyānī (Q2856177)

This book deals with the ins-and-outs of the ``Treatise on the projection of rays'' by the 11th century Andalusian mathematician, astronomer and cadi of Jaén (southern Spain) Ibn Mu'ādh al-Jayyānī. As a matter of fact that work is a short monograph dealing with the mathematical aspects of two astrological doctrines, namely: the division of houses and the projection of rays. The author considers work on it by E. S. Kennedy and J. P. Hogendijk, of our contemporary days. These authors handle also related work in the 11th--15th centuries about those subjects due to Islamic-Spanish authors.NEWLINENEWLINE As subjects, in the book one finds, for instance, also trigonometric theorems, astrological elements, astrolab, astronomical instruments, numerical tables compiled for solving astrological problems. Furthermore, comments on the treatise are discussed, as well as sources to the subjects of investigation and corresponding classifications of methods for projecting the rays and dividing the houses.NEWLINENEWLINE There is much more to say about this splendid contribution by Casulleras. The English abstract contains 17 pages, the Spanish book has 210 pages, four pages of conclusions, the full translation of the Matrah (i.e., the Treatise), the Arabic text of the Matrah, the translation into Spanish of the al-Bīrūnī, Qānūn, 1377--1385, etc. -- Highly recommended.