Translational, rotational and permutational equivariance, as applied to a water molecule, can be visualised in Figure . but with the same translation as applied to the input. c) A 90° rotation applied to the input before 𝜙 is applied, resulting in an output matching part a), but with the same rotation as applied to the input. d) A permutation applied to the atom ordering of the input before 𝜙 is applied, resulting in an output matching part a), but with the same permutation as applied to the input.