  For the 2D and 3D Euler equations, their existing exact solutions are often
in linear form with respect to variables x,y,z. In this paper, the
Clarkson-Kruskal reduction method is applied to reduce the 2D incompressible
Euler equations to a system of completely solvable ordinary equations, from
which several novel nonlinear exact solutions with respect to the variables x
and y are found.
