We study sets of bounded remainder for the twodimensional continuous irrational rotation ({x 1 + t}, {x 2 + tα}) t 0 in the unit square. In particular, we show that for almost all α and every starting point (x 1 , x 2 ), every polygon S with no edge of slope α is a set of bounded remainder. Moreover, every convex set S whose boundary is twice continuously differentiable with positive curvature at every point is a bounded remainder set for almost all α and every starting point (x 1 , x 2 ). Finally we show that these assertions are, in some sense, best possible.
Date