Again, we need to choose a perturbation radiusλ >0and define the shrunk feasible set Qλ :={ ⃗θ∈Q: ⃗θ+λu∈Qand ⃗θ−λu∈Qfor allu∈ {±1} d}

The algorithm Here, we introduce our algorithm as in Algorithm 2 as a slightly modified online version of Algorithm 1