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Jackel", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "LeCun et al., Backpropagation Applied to Handwritten Zip Code Recognition", "url": "https://henriquetmaia.github.io/pdf/papers/lecun1989.pdf" } } ], "evidence": [ { "description": "Bibliographic/stated-result source; not a WRS proof verification", "id": "source-0", "kind": "source_reference", "source": { "citation": "LeCun et al., Backpropagation Applied to Handwritten Zip Code Recognition", "url": "https://henriquetmaia.github.io/pdf/papers/lecun1989.pdf" } } ], "origin": "HUMAN_LEGACY", "record_profile": "wrs-local-research-notes-0.1", "record_type": "research_note", "rrp_version": "0.1", "scope": { "description": "This record is limited to the 1989 seven-author paper and its USPS task; it does not collapse earlier convolutional ideas or later large-scale CNN systems into this work.", "domain": "Computer vision and neural networks" }, "sources": [ { "citation": "LeCun et al., Backpropagation Applied to Handwritten Zip Code Recognition", "url": "https://henriquetmaia.github.io/pdf/papers/lecun1989.pdf" } ], "statement": "# LeCun and colleagues: backpropagation for handwritten zip-code recognition\n\nApplied backpropagation to a constrained multilayer network for recognizing handwritten postal digits, using shared-weight local receptive fields to reduce free parameters.\n\n## Scientific scope\n\nThis record is limited to the 1989 seven-author paper and its USPS task; it does not collapse earlier convolutional ideas or later large-scale CNN systems into this work.\n\n## Reading status\n\nThis is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.\n\n## People and systems\n\nYann LeCun; Bernhard Boser; John S. Denker; Donnie Henderson; Richard E. Howard; Wayne Hubbard; Lawrence D. Jackel\n\nThe named authors contributed to this scoped work; individual effort shares and later applications are not assigned by the byline.\n\n\n\n## Original sources\n\n- [LeCun et al., Backpropagation Applied to Handwritten Zip Code Recognition](https://henriquetmaia.github.io/pdf/papers/lecun1989.pdf)\n", "summary": "Applied backpropagation to a constrained multilayer network for recognizing handwritten postal digits, using shared-weight local receptive fields to reduce free parameters.", "title": "LeCun and colleagues: backpropagation for handwritten zip-code recognition" }, "record_id": "urn:uuid:e13dbf52-6f70-446f-a86e-a0871f002cfa", "version": 1, "source_ref": { "record_id": "urn:uuid:e13dbf52-6f70-446f-a86e-a0871f002cfa", "version": 1, "content_hash": "sha256:e68801c2e86a6529adf1fd3c180123958e12692d51b25ba524d05c9fae62dfe1" }, "export_view": "wrs-public-editorial-view-1", "public_view_hash": "sha256:a52b86fd965cad9bf20c069d851d62344d6cfc2a76c97dd33e9017a6054912ff" }, "target": { "record_id": "urn:uuid:e13dbf52-6f70-446f-a86e-a0871f002cfa", "version": 1, "content_hash": "sha256:e68801c2e86a6529adf1fd3c180123958e12692d51b25ba524d05c9fae62dfe1" }, "published_grade": { "profile": "wrs-published-grade-1", "edition": "2026-10-28.1", "id": "lecun-et-al-zip-code-recognition-1989", "entry_id": "lecun-et-al-zip-code-recognition-1989", "revision": 1, "title": "LeCun and colleagues: backpropagation for handwritten zip-code recognition", "context": "Computer vision and neural networks", "track": "Empirical recognition systems", "band": "A", "modifier": null, "status": "PROVISIONAL_EDITORIAL", "assessed_on": "2026-09-25", "evidence_cutoff": "2026-09-25", "achievement_state": "SUPPORTED_SCOPED_RESULT", "what_changed": "A structured backpropagation network demonstrated practical handwritten digit recognition.", "scope": "The seven-author 1989 paper and its task; not invention of all convolutional networks or later ImageNet-era systems.", "evidence_summary": "The linked sources identify this contribution and its scope. 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