Mathematician

A mathematician was a person whose primary field of study was mathematics.

Lady Peinforte hired a mathematician to calculate the path of Nemesis. (TV: Silver Nemesis)

Another mathematician resided within psychspace and was part of the Great Melding Minds. (COMIC: Forever Dreaming)

The Logopolitans were a race of mathematicians on the planet Logopolis. (TV: Logopolis)