Since this is Ramadhan, I think it will be good for us to know some about Islam.
during Ramadhan I will post everything related with Islam either, muslim profile, country, and etc.
Omar Al Khayyam was a Muslim Persian mathematician, astronomer, philosopher, physician and poet. quote from islamonline
As a mathematician he was great in algebraic, his book "Maqalat fi al-Jabr wa al-Muqabila is a masterpiece of algebra and has great contribution for its development.
As an astronomer, he had introduced a calendar that much better than gregorian calendar. it was called Al-Tarikh-al-Jalali.
To know more about him just visit Muslim Profile