|←Author Index: Kh||Omar Khayyám
|Omar Khayyám (May 18, 1048 – December 4, 1131, in Persian عمر خیام), was a Persian mathematician, astronomer, and writer born in Nishapur, Persia (Iran). He was originally named Ghiyath al-Din Abu'l-Fath Omar ibn Ibrahim Al-Nisaburi Khayyámi (غياث الدين ابو الفتح عمر بن ابراهيم خيام نيشابوري). Khayyám (خیام) is an Arabic loanword meaning "tentmaker".|
Works by this author published before January 1, 1923 are in the public domain worldwide because the author died at least 100 years ago. Translations or editions published later may be copyrighted. Posthumous works may be copyrighted based on how long they have been published in certain countries and areas.