I'm looking for more details of a 14th century mathematician Ala-El-Din Muhammad El Ferjumedhi.

I'm translating a popular book on the history of mathematics, and there is one figure that shows a mathematical manuscript in Arabic. I could find it on Getty Images, where it carries the description "SAUDI ARABIA - CIRCA 2002: Treatise on the Question of Arithmetic Code by The Master Ala-El-Din Muhammed El Ferjumedhi, Saudi Arabia, 14th Century.", but I cannot find this mathematician anywhere, even when I search for different possible spellings of his name.

Treatise on the Question of Arithmetic Code

Any more information about this is greatly appreciated.

  • 1
    $\begingroup$ Just search the last name Ferjumedhi in Google books. I could find couple of other books from 1840s but those are in Swedish, It does seem to have paragraphs on this mathematician and the name of his book is mentioned. I cannot understand the rest. books.google.com/… $\endgroup$
    – AChem
    Oct 11, 2019 at 12:27
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    $\begingroup$ The book linked by @M.Farooq is in Latin. My Latin is extremely rusty, but it seems to say that the Treatise on Questions of Arithmetic mentioned in the question was finished in the year 712 (Islamic calendar, roughly corresponding to A.D. 1312), and that the book is in two parts, of which the first covers multiplication and division, and the second geodesic computations. It contains an introduction which explains necessary technical terms. $\endgroup$
    – njuffa
    Oct 12, 2019 at 5:34
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    $\begingroup$ @njuffa Based on how other Arabic books were translated into Latin, I would say the Alaiticus is the latinised form of Ala-Ed-Din, so it would mean "The treatise of Ala-Ed-Din about arithmetic questions". They didn't always translate the original Arabic title literally but gave it a title like "The book of the famous [Name] about [topic]"; I think it sold better in the Latin world when you mentioned the Arabic name as they were highly regarded as scientific authorities. $\endgroup$ Oct 12, 2019 at 9:19
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    $\begingroup$ @njuffa I think the book from 1849 (which is some kind of thesis by Carl Johan Tornberg at Uppsala university) refers to a different manuscript. My understanding of the Latin (which is also rusty) is that the "Treatise of Alaiticus" was written by Sa'ad el-Soghdi (called Djemal the Turk) for his teacher Ala-Ed-Din el-Ferjumedhi. The Getty Images description seems to imply that their manuscript was discovered around 2002 in Saudi Arabia, so presumably not know to Tornberg. $\endgroup$ Oct 12, 2019 at 10:18
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    $\begingroup$ I think you should convert your comments into a self-answer. It is unlikely that much more information on Ferjumedhi is available. He seems to be an obscure scholar, and the Getty treatise is just expository, with no original material. $\endgroup$
    – Conifold
    Oct 13, 2019 at 9:28


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