@article{atightexpressivityhierarchyforgnnbaseden,
  title = {A Tight Expressivity Hierarchy for GNN-Based Entity Resolution in Master Data Management},
  author = {Ashwin Ganesan},
  year = {2026},
  eprint = {2603.27154},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2603.27154},
}