Omar Khayyam was 52 this year and would die in a further 22 years.
Brahmadeva was about 40 this year and would die in about a further 30 years.
Abraham bar Hiyya was 30 this year and would die in a further 36 years.
Adelard was 25 this year and would die in a further 60 years.
Hemchandra was 11 this year and would die in a further 73 years.
Rabbi Ben Ezra was 8 this year and would die in a further 67 years.
Jabir ibn Aflah was born about this year and would die in about a further 60 years.

There were 7 mathematicians in our archive alive in the year 1100.

800 BC - 700 AD   600 - 1500   1450 - 1700   1650 - 1800   1750 - 1850   1825 - 1900   1875 - 1960