where H ± are RKHSs. This means that any function f ∈ K can be decomposed as f = f + ⊕ f -, where f ± ∈ H ± . Hence, regularisation in eq. ( ) is performed by separately regularising each component of the decomposition. The hyperparameters λ ± can be tuned to provide a balance between the number of instances that violate the constraints and the regularisation of each decomposition component.