Stamps
Persian scientist and mathematician whose full name is Abu Ali al-Hasan ibn al-Hasan ibn al-Haytham, was considered the father of modern optics. In mathematics he may have been the first to find a formula for the sum of the first 100 numbers, which he proved using geometry. He developed analytic geometry to provide a link between algebra and geometry. Alhazen was the first to attempt to prove Euclid's parallel postulate. He attempted to square the circle and worked on perfect numbers in number theory.
Links to my other sites that connect Alhazen to
Currency
| Stamp | Description |
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Malawi, K100, 2008 |