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Jamshid al-Kashi - Astronomer
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Jamshid al-Kashi

description Jamshid al-Kashi Overview

Jamshid al-Kashi was a prominent medieval Persian astronomer born in Samarkand. He significantly contributed to astronomical calculations during his time at Ulugh Beg’s observatory. His work included refining trigonometric tables and calculating Pi with remarkable precision, reaching sixteen decimal places. Al-Kashi's mathematical and observational skills were valued by scholars and rulers interested in advancing scientific knowledge within the Islamic world.

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Where was Jamshid al-Kashi actually born?

Jamshid al-Kashi came from Kashan in present-day Iran, as indicated by the name al-Kashi. He later worked in Samarkand at the scholarly court and observatory associated with the Timurid ruler Ulugh Beg.

How accurately did al-Kashi calculate pi?

Al-Kashi calculated pi to a precision equivalent to about 16 decimal places, an extraordinary achievement for the early 15th century. He described the work in his Treatise on the Circumference.

What was al-Kashi's role at Ulugh Beg's observatory?

He contributed advanced numerical methods and astronomical calculations to the Samarkand scholarly program. His correspondence also provides historians with valuable information about the observatory and the mathematicians working around Ulugh Beg.

Which books by Jamshid al-Kashi are still important?

Miftah al-Hisab, or The Key to Arithmetic, is his broad computational treatise covering arithmetic, geometry, and practical calculation. His work on pi and his writings about astronomical instruments also demonstrate the sophistication of Islamic mathematics in the 1400s.

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