What is recorded here?
Every planar map can be colored with at most four colors so adjacent regions have different colors.
Source-linked catalogue note. A detailed explanatory guide has not yet been prepared for this entry.
Scientific scope
Computer-assisted proof is distinct from modern generative AI. Later corrections and formalizations belong in separate entries.
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People and systems
Kenneth Appel; Wolfgang Haken
Listed source contributors; individual labor shares are not measured
Research locations and affiliations
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Documented countries / regions: United States
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English catalogue narrative
The four-color theorem: the Appel–Haken computer-assisted proof
Every planar map can be colored with at most four colors so adjacent regions have different colors.
Scientific scope
Computer-assisted proof is distinct from modern generative AI. Later corrections and formalizations belong in separate entries.
Reading status
This 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.
People and systems
Kenneth Appel; Wolfgang Haken
Listed source contributors; individual labor shares are not measured