SWhat changed
Mapped the chain to an O(3) nonlinear sigma model and identified the spin-parity distinction.
Scientific scope
The record is Haldane's sole-author 1983 Physical Review Letters paper and its stated semiclassical regime. The earlier unpublished report, companion Physics Letters result, later numerical or experimental confirmation and all symmetry-protected-topological interpretations remain separate.
Evidence
The linked sources identify this contribution and its scope. WRS has not independently reconstructed the scientific claims. The record is Haldane's sole-author 1983 Physical Review Letters paper and its stated semiclassical regime. The earlier unpublished report, companion Physics Letters result, later numerical or experimental confirmation and all symmetry-protected-topological interpretations remain separate.
Contributors
- F. D. M. Haldane · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.
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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