ResearchBenchmarksDistribution-on-distribution regression over graphs on Barabasi-Albert m=50 (test)Follow8.482-Wasserstein DistanceGen-GSNN8.26329.726611.1912.6534May 20, 2026Evaluation ResultsMethodMethodLinks2-Wasserstein DistanceGen-GSNNRestriction map=GeneralRestriction map=General2026.058.48O(d)-GSNNRestriction map=O(d)Restriction map=O(d)2026.058.63Diag-GSNNRestriction map=DiagonalRestriction map=Diagonal2026.058.76Gen-NSDRestriction map=GeneralRestriction map=General2026.059.63Diag-NSDRestriction map=DiagonalRestriction map=Diagonal2026.059.86O(d)-NSDRestriction map=O(d)Restriction map=O(d)2026.0511.12MLP2026.0512.85GCN2026.0513.9