ResearchBenchmarksDistribution-on-distribution regression over graphs on Watts-Strogatz k=45, p=0.5 (test)Follow10.852-Wasserstein DistanceDiag-NSD10.747611.438812.1312.8212May 20, 2026Evaluation ResultsMethodMethodLinks2-Wasserstein DistanceDiag-NSDRestriction map=DiagonalRestriction map=Diagonal2026.0510.85Gen-GSNNRestriction map=GeneralRestriction map=General2026.0510.87Gen-NSDRestriction map=GeneralRestriction map=General2026.0511.46O(d)-GSNNRestriction map=O(d)Restriction map=O(d)2026.0511.8O(d)-NSDRestriction map=O(d)Restriction map=O(d)2026.0511.91Diag-GSNNRestriction map=DiagonalRestriction map=Diagonal2026.0512.22MLP2026.0513.37GCN2026.0513.41