orbithunter.ShiftReflectionOrbitKS.reflection

ShiftReflectionOrbitKS.reflection(axis=1, signed=True)

Reflect the velocity field about the spatial midpoint

Returns

OrbitKS :

OrbitKS whose state is the reflected velocity field -u(L-x,t).

Notes

The correction provided by np.roll is due to the location of the reflection axis in the field array. Numerically it is located at the (self.m//2 + 1)-th element while intuitively it should be “between” self.m//2 + 1 and self.m//2. Simply a consequence of implementation.