In the year 750 AD the only prominent mathematician alive was Alcuin of York, who was 15 years old.  He studied at the cathedral school at York until he became the headmaster of that school in 778.  In 781, Charlemagne invited Alcuin to a meet with other important scholars to discuss educational reform in England.  The king of France also appointed Alcuin to headmaster of the Palace School at Aechan. In the year 796 Alcuin was appointed abbot of the St Martin at Tours.  He died eight years later in 804.

Alcuin wrote texts on astronomy, arithmetic, and geometry in question and answer format.  It is possible that Alcuin wrote a collection of puzzle problems called, Problems for the Quickening of the Mind, but this fact is disputed.  Outside of being a mathematician, Alcuin was a scholar, poet, and educator.  His most famous accomplishment was the development of the Carolingian minuscule, which became the basis of the present Roman alphabet.

Author: Tim Lucas

References:
Mac Tutor History of Mathematics Archive,
http://www-groups.dcs.st-and.ac.uk/~history/index.html

History of Mathematics
http://aleph0.clarku.edu/~djoyce/mathhist/mathhist.html

Eves, Howard.  An Introduction to the History of Mathematics, Philadelphia:
 Saunders College Publishing, 1990.

Alcuin. Deacon, Scholar, and Abbot of Tours
http://justus.anglican.org/resources/bio/161.html

http://www.alcuin.com/Alcuin_of_York.html