Papers › Approximate Vanishing Ideal Computations at Scale

Approximate Vanishing Ideal Computations at Scale

4 Jul 2022arXiv:2207.01236archive 2025-07-28

Elias Wirth, Hiroshi Kera, Sebastian Pokutta

The vanishing ideal of a set of points X = {𝐱₁, …, 𝐱ₘ}⊆ℝⁿ is the set of polynomials that evaluate to $0$ over all points 𝐱 ∈X and admits an efficient representation by a finite subset of generators. In practice, to accommodate noise in the data, algorithms that construct generators of the approximate vanishing ideal are widely studied but their computational complexities remain expensive. In this paper, we scale up the oracle approximate vanishing ideal algorithm (OAVI), the only generator-constructing algorithm with known learning guarantees. We prove that the computational complexity of OAVI is not superlinear, as previously claimed, but linear in the number of samples m. In addition, we propose two modifications that accelerate OAVI's training time: Our analysis reveals that replacing the pairwise conditional gradients algorithm, one of the solvers used in OAVI, with the faster blended pairwise conditional gradients algorithm leads to an exponential speed-up in the number of features n. Finally, using a new inverse Hessian boosting approach, intermediate convex optimization problems can be solved almost instantly, improving OAVI's training time by multiple orders of magnitude in a variety of numerical experiments.

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