22 July 2017
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28 Shawwal 1438
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Kitāb al-Tajrīd fī Uṣūl al-Handasah: Abridgement of the Elements of Geometry by Abū al-Ḥasan ʿAlī ibn Aḥmad al-Nasawī (V AH/XI CE)

Edited by Moustafa Mawaldi
2016
Arabic
Edited text
1
9781905650675
Book
Hardback
1
662
1.114 kg
£60.00

The work, Kitāb al-tajrīd fī uṣūl al-handasah, is one of the key heritage sources for students of geometrical sciences, especially since the contributions of its author, Abū al-Ḥasan ‘Alī b. Aḥmad al-Nasawī, have attracted special international recognition. The book lays the foundation for a practical geometry of Arab origin, covering discrete shapes (i.e. theories), which are independent from each other, leading to easy comprehension and assimilation. This geometry provides proofs in the domain of area and measurement, and establishes the roots of all principal human crafts. The work represents an important introduction leading to a more profound insight into the science of geometry, making it accessible to a wide range of people, while remaining simple enough for craftsmen. Al-Nasawī presented these forms using an approach defined by simplification, use of easy language, and comprehensible and robust proofs. The importance of the book, Kitāb al-tajrīd, is manifested in the methodology adopted by al-Nasawī in the presentation and flow of logically-connected scientific topics. Hence, he was able to construct a practical geometrical framework that served the aim for which the book was authored. In this work, al-Nasawī principally treated the topic of shapes composed of straight lines, and those theories related to the circle. He also covered the question of the circle, whether inscribed or circumscribed, in relation to regular shapes. In addition, he addressed the matter of proportion, applying the ratio theorem mainly to plane and three-dimentional Euclidean geometrical shapes, and others.

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29/06/2017