830

Events in 830 3

• 830 Al-Khwarizmi invents algebra Kitab al-mukhtasar fi hisab al-jabr — the word algebra is born Around 830 AD, Muhammad ibn Musa al-Khwarizmi, a scholar at the House of Wisdom in Baghdad, published his treatise on solving equations by balancing and completion. The Arabic title contained the word al-jabr, which became algebra in Latin. Al-Khwarizmi also introduced the Hindu-Arabic numeral system to the Islamic world and described algorithms systematically — the word algorithm derives from the Latin form of his name. His work was the foundation of all subsequent mathematics.
• 830 – 1000 Archimedes' works preserved by Islamic scholars Arabic translations keep his mathematics alive During the Islamic Golden Age (8th–12th centuries), scholars at the House of Wisdom in Baghdad translated Archimedes' surviving works into Arabic, preserving them when the original Greek manuscripts were crumbling or lost. Al-Khwarizmi, Thabit ibn Qurra, and other Islamic mathematicians studied and extended his methods. Without these translations, Archimedes' work might have been entirely lost to the West.
• 830 The collapse accelerates Southern Maya lowlands Across the central and southern lowlands, cities stopped building, dynasties stopped recording, and populations fell by an estimated 80 to 90 per cent within a century. Drought, soil exhaustion, endemic warfare and the failure of divine kingship all played a part.