# Mathematician:Abu Ali al-Hasan ibn al-Haytham

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## Mathematician

Persian philosopher, scientist and all-round genius who made significant contributions to number theory and geometry.

His work influenced the work of René Descartes and the calculus of Isaac Newton.

## Nationality

Persian

## History

- Born: 965, in Basra, Persia (now Iraq)
- Died: c. 1039, in Cairo, Egypt

## Theorems and Definitions

## Publications

*Analysis and Synthesis*, in which he discussed perfect numbers*Opuscula*, in which he used the result now known as Wilson's Theorem*Book of Optics**Balance of Wisdom**Corrections to the Almagest**Discourse on Place**Exact Determination of the Pole**Exact Determination of the Meridian**Finding the Direction of Qibla by Calculation**Horizontal Sundials**Hour Lines**Doubts Concerning Ptolemy**Maqala fi'l-Qarastun**On Completion of the Conics**On Seeing the Stars**On Squaring the Circle**On the Burning Sphere**On the Configuration of the World**On the Form of Eclipse**On the Light of Stars**On the Light of the Moon**On the Milky Way**On the Nature of Shadows**On the Rainbow and Halo**Resolution of Doubts Concerning the Almagest**Resolution of Doubts Concerning the Winding Motion**The Correction of the Operations in Astronomy**The Different Heights of the Planets**The Direction of Mecca**The Model of the Motions of Each of the Seven Planets**The Model of the Universe**The Motion of the Moon**The Ratios of Hourly Arcs to their Heights**The Winding Motion**Treatise on Light**Treatise on Place**Treatise on the Influence of Melodies on the Souls of Animals*

Approximately $50$ of the supposedly $200$ or so works of his survive. Not all have been studied and translated.

## Also known as

Full name:

**Abū ʿAlī al-Ḥasan ibn al-Ḥasan ibn al-Haytham**

In Arabic:

**ابو علي، حسن بن حسن بن الهيثم**

In Persian:

**ابن هیثم**

Best known as **Alhacen** or (deprecated) **Alhazen**.

## Sources

- John J. O'Connor and Edmund F. Robertson: "Abu Ali al-Hasan ibn al-Haytham": MacTutor History of Mathematics archive

- 1998: David Nelson:
*The Penguin Dictionary of Mathematics*(2nd ed.) ... (previous) ... (next):**al-Haytham, Abu 'Ali al-Hasan ibn**(Westernized form**Alhazen**)**(c. 985-1038)** - 2008: David Nelson:
*The Penguin Dictionary of Mathematics*(4th ed.) ... (previous) ... (next):**al-Haytham, Abu 'Ali al-Hasan ibn**(Westernized form**Alhazen**)**(c. 985-1038)**