Fig. 1.
Transport of the unit sphere (black dots) by the vector field v(x, y) := (x−1, 2y). At t = 0.25, the resulting ellipse (white dots) is centered at (1 − e0.25, 0).
Transport of the unit sphere (black dots) by the vector field v(x, y) := (x−1, 2y). At t = 0.25, the resulting ellipse (white dots) is centered at (1 − e0.25, 0).