Person: AlNasawi
AlNasawi was an Islamic mathematician who wrote summaries of some of Euclid's Elements.
Mathematical Profile (Excerpt):
 AlNasawi had prepared an original version of it in Persian for the library of the Iranian prince Majd alDawlah, of the Buyid dynasty.
 Before the work was completed, however, Majd alDawlah was deposed as ruler so, on completion of the work, alNasawi presented it to Sharaf alMuluk who was the vizier of Jalal adDawlah (Jalal adDawlah was the ruler of Baghdad from 1025 to 1044).
 Sharaf alMuluk ordered alNasawi to rewrite the work in Arabic, and this he did.
 From this description, and from the fact that alNasawi dedicated another work to a Shi'ite leader in Baghdad, we at least can deduce that alNasawi worked for part of his life in Baghdad.
 A paragraph about alNasawi's life has been found in a manuscript and it tells us that he spent time in Rayy, and was visited by ibn Sina.
 Tract 26 is a summary of Euclid's Elements by alNasawi.
 The reasons which alNasawi gives for writing this summary are twofold.
 All alNasawi appears to have done is to omit some constructions and change a few of the proofs.
 The arithmetic book by alNasawi is of this third "Indian numeral" type.
 In each of the four cases alNasawi explains the four elementary arithmetical operations.
 Each method for each of the four types is illustrated with worked examples and a checking procedure is explained which usually involves usually casting out nines The method alNasawi gives for taking cube roots is the same as the method described in the Chinese Mathematics in Nine Books, but quite how he learnt of this method is unknown.
 AlNasawi is critical of works on arithmetic written by earlier authors.
 In fact, in some respects, alNasawi does not rate too highly as a mathematician.
 There seems nothing original in any of his works and, more significantly, there are several places where alNasawi presents pieces of mathematics which he fails to properly understand.
 Two other works by alNasawi have survived.
Born about 1010, possibly Nasa, Khurasan,Iran. Died about 1075, possibly Baghdad, Iraq.
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Tags relevant for this person:
Ancient Arab, Origin Iran
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References
Adapted from other CC BYSA 4.0 Sources:
 O’Connor, John J; Robertson, Edmund F: MacTutor History of Mathematics Archive