# Mathematician:Thabit ibn Qurra

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## Mathematician

Sabian mathematician, physician, astronomer, and translator who lived in Baghdad in the second half of the ninth century during the time of Abbasid Caliphate.

Made important discoveries in algebra, geometry, and astronomy.

One of the first reformers of the Ptolemaic system in Astronomy.

A founder of the discipline of statics.

## Nationality

Assyrian

## History

- Born: 836 in Harran, Mesopotamia (now Turkey)
- Died: 18 February 901 in Baghdad, (now in Iraq)

## Theorems and Definitions

Results named for **Thabit ibn Qurra** can be found here.

Definitions of concepts named for **Thabit ibn Qurra** can be found here.

## Publications

*On the Sector-Figure*which deals with Menelaus' Theorem*On the Composition of Ratios**Book on the Determination of Amicable Numbers*

- Translated from Greek into Arabic works by:

- Revised the translation of Euclid's
*The Elements*of Hunayn ibn Ishaq.

- Rewrote Hunayn ibn Ishaq's translation of Claudius Ptolemy's
*Almagest* - Translated Claudius Ptolemy's
*Geography*.

- Translated of a work by Archimedes of Syracuse which gave a construction of a regular heptagon. This was discovered in the 20th century, the original having been lost.

## Also known as

Full name: **Al-Ṣābiʾ Thābit ibn Qurra al-Ḥarrānī**.

In Arabic: **ثابت بن قرة**

In Latin: **Thebit**, **Thebith** or **Tebit**.

## Sources

- John J. O'Connor and Edmund F. Robertson: "Thabit ibn Qurra": MacTutor History of Mathematics archive

- 1986: David Wells:
*Curious and Interesting Numbers*... (previous) ... (next): A List of Mathematicians in Chronological Sequence - 1986: David Wells:
*Curious and Interesting Numbers*... (previous) ... (next): $220$ - 1997: David Wells:
*Curious and Interesting Numbers*(2nd ed.) ... (previous) ... (next): A List of Mathematicians in Chronological Sequence - 1997: David Wells:
*Curious and Interesting Numbers*(2nd ed.) ... (previous) ... (next): $220$