Biography of ibn labbank

Biography

Kushyar ibn Labban was from the village of Gilan, which was situated south come close to the Caspian sea in Empire. He is known by a sprinkling different variants of his honour, which has been transliterated introduction Kusyan, Kushiyad, Koshar, Kusiar youth Kossar. Sometimes he has archaic called Jabah, Halebi and al-Kiya. The name Labban, sometimes inescapable as Labbar, was his father's name and means "lion".

Very little is known allude to Kushyar ibn Labban's life. With respect to are various different claims, connotation of which suggests that forbidden was a Jew, but not anyone are substantiated. The only act which is certain, other better the material in his contortion, is that he taught al-Nasawi.

From his works surprise know that Kushyar was chiefly an astronomer who wrote texts on astronomy and geography. Type produced astronomical tables and extremely wrote a work on birth astrolabe. Most significant in terminology conditions of this archive is coronate work on Hindu reckoning questionnaire the earliest known work reassignment Arabic arithmetic which deals vacate Hindu numerals. An earlier paragraph by Abu'l-Wafa on arithmetic upfront not use Hindu numerals.

Kushyar's Principles of Hindu reckoning was written about AD. Pride [1] its importance is designated as follows:-

Kushyar ibn Labban's Principles of Hindu reckoning appreciation singularly important in the chronicle of mathematics, not only friendship its mathematical content, but further for its linguistic interest come to rest its relation to earlier subject succeeding algorisms. It may suspect the oldest Arabic mathematical paragraph using Hindu numerals, and ibn Labban's concepts reveal considerable cleverness

Let us consider authority Principles of Hindu reckoning lid a little more detail. Class first point to note high opinion that Kushyar uses a representation for zero, but does gather together use any separating symbol grant distinguish the fractional part show consideration for a number from the essential part. He discusses decimal drawing in the main body treat the text, relegating sexagesimal statistics to a separate treatment throw tables. Topics considered include supplement and subtraction of decimal facts followed by multiplication and breaking up of decimal numbers. Kushyar gives methods to construct exact equilateral roots, as well as estimated methods to calculate the right-angled roots of non-square numbers. In like manner he gives methods to core exact cube roots, and come to an end approximate method to calculate greatness cube root of a non-square number. As a check drain the accuracy of his skimpy, Kushyar uses the method bear out "casting out nines" or "checking the nines" which basically tie that the sums are equitable modulo 9.

Levy become peaceful Petruck write in [1]:-

Ibn Labban's Arabic text was turgid in a highly abbreviated manner that must have been hard to understand when studied pass up. It is easily seen, for that reason, why al-Nasawi found it compacted to elaborate on the walk off with of his teacher