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Topological graph theory / Conjectures / Heawood conjecture / Four color theorem / Gerhard Ringel / Torus / Cayley graph / Manifold / Graph / Graph theory / Mathematics / Graph coloring


SOLUTION OF THE HEAWOOD MAP-COLORING PROBLEM* BY GERHARD RINGEL AND J. W. T. YOUNGS UNIVERSITY OF CALIFORNIA (SANTA CRUZ)
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City

Berlin / London / Hamburg / New York / SANTA CRUZ / /

Company

Oxford University Press / N. A. S. / Gustin / Z30 / /

Country

France / Pakistan / Spain / /

Currency

pence / /

Event

Business Partnership / /

Facility

University of iLontpellier / COLORING PROBLEM* BY GERHARD RINGEL AND J. W. T. YOUNGS UNIVERSITY OF CALIFORNIA / Free University of Berlin / University of California / /

IndustryTerm

law holds / simpler solution / additive / particular solution / /

Organization

University of iLontpellier / UNIVERSITY OF CALIFORNIA / National Science Foundation / Free University of Berlin / Oxford University / /

Person

Richard Guy / /

Position

Professor / first author / visiting professor / /

ProvinceOrState

California / Arizona / Colorado / /

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