SWhat changed
Introduced categories, functors and natural equivalences as a general language for expressing mappings, constructions and naturality across algebra and topology.
Scientific scope
The record is the exact 1945 Transactions of the AMS paper. Earlier uses of related diagrams, later category-theory foundations, enriched or higher categories and categorical logic remain separate.
Evidence
The linked sources identify this contribution and its scope. WRS has not independently reconstructed the scientific claims. The record is the exact 1945 Transactions of the AMS paper. Earlier uses of related diagrams, later category-theory foundations, enriched or higher categories and categorical logic remain separate.
Contributors
- Samuel Eilenberg · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.
- Saunders MacLane · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.
- AMS copy of General Theory of Natural Equivalences
- Crossref record for General Theory of Natural Equivalences
Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.
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