arXiv Statistics ML By Gabriel Rioux, Joanna Marks, Riccardo Passeggeri, Ziv Goldfeld

Discrete Gromov-Wasserstein Duality: Algorithms and Isomorphism Testing

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The paper presents a new duality formulation for the Gromov‑Wasserstein distance that applies to all finitely supported metric‑measure spaces, with and without entropic regularization. Using this duality, the authors derive sample‑complexity bounds and limit distributions for empirical GW distances, and introduce algorithms with formal convergence guarantees. These results enable a principled, efficient method for testing isomorphism between distributions on graphs with a fixed number of nodes based on samples.

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