a mathematician from the 11th century would be Omar Khayyam.
Eleventh
either is acceptable
The mathematician in the 17th century who wrote the exponent after the unknown is Herigone.
It ran from 1001 to 1100.
the saxons
In the eleventh century
One ancient Greek mathematician was Euclid.
ptolemy
Edward Burger
1st century
Algebra
The English mathematician John Wallis (1616 - 1703).