The field of definition of a real representation of a quiver
Author: Aidan Schofield
Journal: Proc. Amer. Math. Soc. 116 (1992), 293-295
MSC: Primary 16G20; Secondary 17B20
MathSciNet review: 1072091
Abstract: In answer to a question of Kac, we show that if is a real root for the quiver , then there is a unique indecomposable of dimension vector defined over the rational numbers.