1. Gamze YILDIZ 200822053

2. * Al-Khwarazmi’s Life * Al-Khwarazmi’s Contributions  Algebra  Arithmetic  Astronomy  Geography  Other works Al-Khwarazmi’s books about Mathematics, Astronomy, Geography and History His works about Arithmetic, Geography and Astronomy

3. * His actual name is Abū ʿ Abdallāh Mu ḥ ammad ibn Mūsā al- Khwārizmī. * It is considered that he was born in 780 and he was died in 850 in Baghdad. * He was left Khorezm to learn science and he went to Baghdad. Here, he took the courses from Islamic scholars and improved oneself.

4. * Al-Khwārizmī was received great help and support from al-Ma ʾ mūn who was Abbasid Caliph. * Al-Khwārizmī worked in Baghdad as a scholar at the House of Wisdom established by Caliph al-Ma ʾ mūn.

5. * Al-Khwārizmī determined the rules of solving first and second order equations by the analytical methods for the first time. * He also determined the rules of solving equation with one unknown by the algebraic and geometric methods.

6. * In mathematics, he used the number of zero for the first time. * For the first time, he revealed science of algebra methodical and systematic. * He found the today’s computer science and digital electroincs which is the basis of 2(binary) number system.

7. * He wrote a book in 825 and this book was translated into Latin with the name of “Algoritmi de Numero Indorum”. * Because of the fact that his name was known as “Algoritmi” in Europe, the term “Algorithm ” was derived from his name.

8. * He gathered the calculations belong to diameter of Earth in his book named “Kitab Surat Al-Arz”.

9. Al-Khwārizmī’ s Books Mathematics El- Kitab’ul Muhtasar fi’l Hesab’il Cebri ve’l Mukabele Kitab al-Muhtasar fil Hisab el-Hind El-Mesahat Astronomy Zîc-ul Harezmî Kitab al-Amal bi'l Usturlab Kitab'ul Ruhname

10. Geography Kitab surat al-arz History Kitab’ul Tarih

14. * https://tr.wikipedia.org/wiki/El- Harezm%C3%AE https://tr.wikipedia.org/wiki/El- Harezm%C3%AE * http://www.belgeler.com/blg/2zbi/0-sayisi-ve- el-harezm http://www.belgeler.com/blg/2zbi/0-sayisi-ve- el-harezm * http://www.learn- persian.com/english/Khwarizmi_creator_of_alg orithm_algebra.php http://www.learn- persian.com/english/Khwarizmi_creator_of_alg orithm_algebra.php * http://www.kalemguzeli.net/harezmi.html http://www.kalemguzeli.net/harezmi.html